R1#show running-config Building configuration... Current configuration : 2741 bytes ! ! Last configuration change at 14:29:15 UTC Fri Nov 15 2019 ! version 15.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R1 ! boot-start-marker boot-end-marker ! ! ! no aaa new-model ! ! ! ! ! ! ! ! ! ! ! ! ! ! no ip domain lookup ip cef ipv6 unicast-routing ipv6 cef multilink bundle-name authenticated ! ! key chain mychain key 1 key-string cisco cts logging verbose ! ! license udi pid CISCO1941/K9 sn FCZ2125B0FA ! ! ! redundancy ! ! ! ! ! ! interface Loopback0 no ip address ipv6 address FE80::10 link-local ipv6 address 2001:DB8:CAFE:10::1/64 ipv6 eigrp 205 ! interface Loopback11 ip address 172.16.11.1 255.255.255.0 ! interface Loopback12 ip address 172.16.12.1 255.255.255.0 ! interface Loopback13 ip address 172.16.13.1 255.255.255.0 ! interface Loopback14 ip address 172.16.14.1 255.255.255.0 ! interface Loopback15 ip address 172.16.15.1 255.255.255.0 ! interface Loopback55 ip address 172.16.55.1 255.255.255.0 ! interface Loopback56 ip address 172.16.56.1 255.255.255.0 ! interface Loopback57 ip address 172.16.57.1 255.255.255.0 ! interface Loopback58 ip address 172.16.58.1 255.255.255.0 ! interface Loopback100 ip address 172.16.100.65 255.255.255.192 ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 no ip address shutdown duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 description Link to R2 bandwidth 128000 ip address 20.10.10.1 255.255.255.252 ip authentication mode eigrp 205 md5 ip authentication key-chain eigrp 205 mychain ip summary-address eigrp 205 172.16.0.0 255.255.128.0 ipv6 address FE80::1 link-local ipv6 address 2001:DB8:ABCD:10::1/64 ipv6 eigrp 205 clock rate 128000 ! interface Serial0/0/1 no ip address shutdown clock rate 2000000 ! ! router eigrp 205 network 20.10.10.0 0.0.0.3 network 172.16.11.0 0.0.0.255 network 172.16.12.0 0.0.0.255 network 172.16.13.0 0.0.0.255 network 172.16.14.0 0.0.0.255 network 172.16.15.0 0.0.0.255 network 172.16.55.0 0.0.0.255 network 172.16.56.0 0.0.0.255 network 172.16.57.0 0.0.0.255 network 172.16.58.0 0.0.0.255 network 172.16.100.64 0.0.0.63 passive-interface default no passive-interface Serial0/0/0 eigrp router-id 1.1.1.1 ! ip forward-protocol nd ! no ip http server no ip http secure-server ! ! ipv6 router eigrp 205 ! ! ! ! control-plane ! ! ! line con 0 logging synchronous line aux 0 line 2 no activation-character no exec transport preferred none transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 login transport input none ! scheduler allocate 20000 1000 ! end R1#sh R1#show ip in R1#show ip interface br R1#show ip interface brief Interface IP-Address OK? Method Status Protocol Embedded-Service-Engine0/0 unassigned YES unset administratively down down GigabitEthernet0/0 unassigned YES unset administratively down down GigabitEthernet0/1 unassigned YES unset administratively down down Serial0/0/0 20.10.10.1 YES manual up up Serial0/0/1 unassigned YES unset administratively down down Loopback0 unassigned YES unset up up Loopback11 172.16.11.1 YES manual up up Loopback12 172.16.12.1 YES manual up up Loopback13 172.16.13.1 YES manual up up Loopback14 172.16.14.1 YES manual up up Loopback15 172.16.15.1 YES manual up up Loopback55 172.16.55.1 YES manual up up Loopback56 172.16.56.1 YES manual up up Loopback57 172.16.57.1 YES manual up up Loopback58 172.16.58.1 YES manual up up Loopback100 172.16.100.65 YES manual up up R1#sh R1#show ip rou R1#show ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override Gateway of last resort is 20.10.10.2 to network 0.0.0.0 D*EX 0.0.0.0/0 [170/659968] via 20.10.10.2, 00:29:30, Serial0/0/0 20.0.0.0/8 is variably subnetted, 3 subnets, 2 masks C 20.10.10.0/30 is directly connected, Serial0/0/0 L 20.10.10.1/32 is directly connected, Serial0/0/0 D EX 20.10.10.4/30 [170/557568] via 20.10.10.2, 00:45:33, Serial0/0/0 172.16.0.0/16 is variably subnetted, 21 subnets, 4 masks D 172.16.0.0/17 is a summary, 00:32:23, Null0 C 172.16.11.0/24 is directly connected, Loopback11 L 172.16.11.1/32 is directly connected, Loopback11 C 172.16.12.0/24 is directly connected, Loopback12 L 172.16.12.1/32 is directly connected, Loopback12 C 172.16.13.0/24 is directly connected, Loopback13 L 172.16.13.1/32 is directly connected, Loopback13 C 172.16.14.0/24 is directly connected, Loopback14 L 172.16.14.1/32 is directly connected, Loopback14 C 172.16.15.0/24 is directly connected, Loopback15 L 172.16.15.1/32 is directly connected, Loopback15 C 172.16.55.0/24 is directly connected, Loopback55 L 172.16.55.1/32 is directly connected, Loopback55 C 172.16.56.0/24 is directly connected, Loopback56 L 172.16.56.1/32 is directly connected, Loopback56 C 172.16.57.0/24 is directly connected, Loopback57 L 172.16.57.1/32 is directly connected, Loopback57 C 172.16.58.0/24 is directly connected, Loopback58 L 172.16.58.1/32 is directly connected, Loopback58 C 172.16.100.64/26 is directly connected, Loopback100 L 172.16.100.65/32 is directly connected, Loopback100 172.26.0.0/24 is subnetted, 3 subnets D EX 172.26.21.0 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 D EX 172.26.22.0 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 D EX 172.26.23.0 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 D EX 192.168.40.0/24 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 D EX 192.168.45.0/24 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 D EX 192.168.50.0/24 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 D EX 192.168.55.0/24 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 D EX 192.168.60.0/24 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 D EX 192.168.65.0/24 [170/557568] via 20.10.10.2, 00:17:29, Serial0/0/0 R1#sh R1#show ipv R1#show ipv6 in R1#show ipv6 interface br R1#show ipv6 interface brief Em0/0 [administratively down/down] unassigned GigabitEthernet0/0 [administratively down/down] unassigned GigabitEthernet0/1 [administratively down/down] unassigned Serial0/0/0 [up/up] FE80::1 2001:DB8:ABCD:10::1 Serial0/0/1 [administratively down/down] unassigned Loopback0 [up/up] FE80::10 2001:DB8:CAFE:10::1 Loopback11 [up/up] unassigned Loopback12 [up/up] unassigned Loopback13 [up/up] unassigned Loopback14 [up/up] unassigned Loopback15 [up/up] unassigned Loopback55 [up/up] unassigned Loopback56 [up/up] unassigned Loopback57 [up/up] unassigned Loopback58 [up/up] unassigned Loopback100 [up/up] unassigned R1#sh R1#show ipv R1#show ipv6 rou R1#show ipv6 route IPv6 Routing Table - default - 9 entries Codes: C - Connected, L - Local, S - Static, U - Per-user Static route B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2 IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2 ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, a - Application EX 2001:DB8:9A:10AA::1/128 [170/557568] via FE80::2, Serial0/0/0 C 2001:DB8:ABCD:10::/64 [0/0] via Serial0/0/0, directly connected L 2001:DB8:ABCD:10::1/128 [0/0] via Serial0/0/0, receive EX 2001:DB8:ABCD:20::/64 [170/1043968] via FE80::2, Serial0/0/0 EX 2001:DB8:ABCD:100::/64 [170/659968] via FE80::2, Serial0/0/0 C 2001:DB8:CAFE:10::/64 [0/0] via Loopback0, directly connected L 2001:DB8:CAFE:10::1/128 [0/0] via Loopback0, receive EX 2001:DB8:CAFE:100::/64 [170/659968] via FE80::2, Serial0/0/0 L FF00::/8 [0/0] via Null0, receive R1# befor filter R1#sh ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override Gateway of last resort is 20.10.10.2 to network 0.0.0.0 D*EX 0.0.0.0/0 [170/659968] via 20.10.10.2, 00:07:31, Serial0/0/0 20.0.0.0/8 is variably subnetted, 3 subnets, 2 masks C 20.10.10.0/30 is directly connected, Serial0/0/0 L 20.10.10.1/32 is directly connected, Serial0/0/0 D EX 20.10.10.4/30 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 172.16.0.0/16 is variably subnetted, 21 subnets, 4 masks D 172.16.0.0/17 is a summary, 00:10:24, Null0 C 172.16.11.0/24 is directly connected, Loopback11 L 172.16.11.1/32 is directly connected, Loopback11 C 172.16.12.0/24 is directly connected, Loopback12 L 172.16.12.1/32 is directly connected, Loopback12 C 172.16.13.0/24 is directly connected, Loopback13 L 172.16.13.1/32 is directly connected, Loopback13 C 172.16.14.0/24 is directly connected, Loopback14 L 172.16.14.1/32 is directly connected, Loopback14 C 172.16.15.0/24 is directly connected, Loopback15 L 172.16.15.1/32 is directly connected, Loopback15 C 172.16.55.0/24 is directly connected, Loopback55 L 172.16.55.1/32 is directly connected, Loopback55 C 172.16.56.0/24 is directly connected, Loopback56 L 172.16.56.1/32 is directly connected, Loopback56 C 172.16.57.0/24 is directly connected, Loopback57 L 172.16.57.1/32 is directly connected, Loopback57 C 172.16.58.0/24 is directly connected, Loopback58 L 172.16.58.1/32 is directly connected, Loopback58 C 172.16.100.64/26 is directly connected, Loopback100 L 172.16.100.65/32 is directly connected, Loopback100 172.26.0.0/24 is subnetted, 4 subnets D EX 172.26.20.0 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 172.26.21.0 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 172.26.22.0 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 172.26.23.0 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 192.168.40.0/24 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 192.168.45.0/24 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 192.168.50.0/24 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 192.168.55.0/24 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 192.168.60.0/24 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 D EX 192.168.65.0/24 [170/557568] via 20.10.10.2, 00:23:34, Serial0/0/0 R1# After the filter R1#sh ip route *Nov 15 14:14:32.807: %DUAL-5-NBRCHANGE: EIGRP-IPv4 205: Neighbor 20.10.10.2 (Serial0/0/0) is resync: peer graceful-restart *Nov 15 14:14:33.031: %SYS-5-CONFIG_I: Configured from console by console R1#sh ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override Gateway of last resort is 20.10.10.2 to network 0.0.0.0 D*EX 0.0.0.0/0 [170/659968] via 20.10.10.2, 00:12:33, Serial0/0/0 20.0.0.0/8 is variably subnetted, 3 subnets, 2 masks C 20.10.10.0/30 is directly connected, Serial0/0/0 L 20.10.10.1/32 is directly connected, Serial0/0/0 D EX 20.10.10.4/30 [170/557568] via 20.10.10.2, 00:28:36, Serial0/0/0 172.16.0.0/16 is variably subnetted, 21 subnets, 4 masks D 172.16.0.0/17 is a summary, 00:15:26, Null0 C 172.16.11.0/24 is directly connected, Loopback11 L 172.16.11.1/32 is directly connected, Loopback11 C 172.16.12.0/24 is directly connected, Loopback12 L 172.16.12.1/32 is directly connected, Loopback12 C 172.16.13.0/24 is directly connected, Loopback13 L 172.16.13.1/32 is directly connected, Loopback13 C 172.16.14.0/24 is directly connected, Loopback14 L 172.16.14.1/32 is directly connected, Loopback14 C 172.16.15.0/24 is directly connected, Loopback15 L 172.16.15.1/32 is directly connected, Loopback15 C 172.16.55.0/24 is directly connected, Loopback55 L 172.16.55.1/32 is directly connected, Loopback55 C 172.16.56.0/24 is directly connected, Loopback56 L 172.16.56.1/32 is directly connected, Loopback56 C 172.16.57.0/24 is directly connected, Loopback57 L 172.16.57.1/32 is directly connected, Loopback57 C 172.16.58.0/24 is directly connected, Loopback58 L 172.16.58.1/32 is directly connected, Loopback58 C 172.16.100.64/26 is directly connected, Loopback100 L 172.16.100.65/32 is directly connected, Loopback100 172.26.0.0/24 is subnetted, 3 subnets D EX 172.26.21.0 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 D EX 172.26.22.0 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 D EX 172.26.23.0 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 D EX 192.168.40.0/24 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 D EX 192.168.45.0/24 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 D EX 192.168.50.0/24 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 D EX 192.168.55.0/24 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 D EX 192.168.60.0/24 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 D EX 192.168.65.0/24 [170/557568] via 20.10.10.2, 00:00:32, Serial0/0/0 R2#show running-config Building configuration... Current configuration : 2620 bytes ! ! Last configuration change at 15:06:31 UTC Fri Nov 15 2019 ! version 15.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R2 ! boot-start-marker boot-end-marker ! ! ! no aaa new-model ! ! ! ! ! ! ! ! ! ! ! ! ! ! no ip domain lookup ip cef ipv6 unicast-routing ipv6 cef multilink bundle-name authenticated ! ! key chain mychain key 1 key-string cisco cts logging verbose ! ! license udi pid CISCO1941/K9 sn FCZ2125B0F2 ! ! ! redundancy ! ! ! ! ! ! interface Loopback0 no ip address ipv6 address 2001:DB8:CAFE:100::1/64 ipv6 ospf 1 area 0 ! interface Loopback1 no ip address ipv6 address 2001:DB8:ABCD:100::1/64 ipv6 ospf 1 area 0 ! interface Loopback209 ip address 209.65.12.254 255.255.255.252 ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 no ip address shutdown duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 description Link to R1 ip address 20.10.10.2 255.255.255.252 ip authentication mode eigrp 205 md5 ip authentication key-chain eigrp 205 mychain ipv6 address FE80::2 link-local ipv6 address 2001:DB8:ABCD:10::2/64 ipv6 eigrp 205 ! interface Serial0/0/1 bandwidth 128000 ip address 20.10.10.5 255.255.255.252 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ipv6 address FE80::2 link-local ipv6 address 2001:DB8:ABCD:20::1/64 ipv6 ospf 1 area 0 clock rate 128000 ! ! router eigrp 205 distribute-list OSPF20-filter out ospf 1 network 20.10.10.0 0.0.0.3 redistribute ospf 1 metric 128000 100 255 1 1500 redistribute static passive-interface default no passive-interface Serial0/0/0 ! router ospf 1 router-id 2.2.2.2 redistribute eigrp 205 subnets passive-interface default no passive-interface Serial0/0/1 network 20.10.10.4 0.0.0.3 area 0 default-information originate ! ip forward-protocol nd ! no ip http server no ip http secure-server ! ip route 0.0.0.0 0.0.0.0 Loopback209 ! ip access-list standard OSPF20-filter deny 172.26.20.0 0.0.0.255 permit any ! ipv6 router eigrp 205 redistribute ospf 1 metric 128000 100 255 1 1500 redistribute connected ! ipv6 router ospf 1 redistribute connected redistribute eigrp 205 redistribute static ! ! ! ! control-plane ! ! ! line con 0 logging synchronous line aux 0 line 2 no activation-character no exec transport preferred none transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 login transport input none ! scheduler allocate 20000 1000 ! end R2#sh R2#show ip int R2#show ip interface br R2#show ip interface brief Interface IP-Address OK? Method Status Protocol Embedded-Service-Engine0/0 unassigned YES unset administratively down down GigabitEthernet0/0 unassigned YES unset administratively down down GigabitEthernet0/1 unassigned YES unset administratively down down Serial0/0/0 20.10.10.2 YES manual up up Serial0/0/1 20.10.10.5 YES manual up up Loopback0 unassigned YES unset up up Loopback1 unassigned YES unset up up Loopback209 209.65.12.254 YES manual up up R2# sh R2# show ip rou R2# show ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override Gateway of last resort is 0.0.0.0 to network 0.0.0.0 S* 0.0.0.0/0 is directly connected, Loopback209 20.0.0.0/8 is variably subnetted, 4 subnets, 2 masks C 20.10.10.0/30 is directly connected, Serial0/0/0 L 20.10.10.2/32 is directly connected, Serial0/0/0 C 20.10.10.4/30 is directly connected, Serial0/0/1 L 20.10.10.5/32 is directly connected, Serial0/0/1 172.16.0.0/17 is subnetted, 1 subnets D 172.16.0.0 [90/2297856] via 20.10.10.1, 00:19:12, Serial0/0/0 172.26.0.0/24 is subnetted, 4 subnets O IA 172.26.20.0 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 172.26.21.0 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 172.26.22.0 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 172.26.23.0 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 192.168.40.0/24 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 192.168.45.0/24 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 192.168.50.0/24 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 192.168.55.0/24 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 192.168.60.0/24 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 O IA 192.168.65.0/24 [110/2] via 20.10.10.6, 00:53:14, Serial0/0/1 209.65.12.0/24 is variably subnetted, 2 subnets, 2 masks C 209.65.12.252/30 is directly connected, Loopback209 L 209.65.12.254/32 is directly connected, Loopback209 R2#sh R2#show ipv R2#show ipv6 int R2#show ipv6 interface br R2#show ipv6 interface brief Em0/0 [administratively down/down] unassigned GigabitEthernet0/0 [administratively down/down] unassigned GigabitEthernet0/1 [administratively down/down] unassigned Serial0/0/0 [up/up] FE80::2 2001:DB8:ABCD:10::2 Serial0/0/1 [up/up] FE80::2 2001:DB8:ABCD:20::1 Loopback0 [up/up] FE80::A2E0:AFFF:FEE8:6AC0 2001:DB8:CAFE:100::1 Loopback1 [up/up] FE80::A2E0:AFFF:FEE8:6AC0 2001:DB8:ABCD:100::1 Loopback209 [up/up] unassigned R2# sh R2# show ipv R2# show ipv6 rou R2# show ipv6 route IPv6 Routing Table - default - 11 entries Codes: C - Connected, L - Local, S - Static, U - Per-user Static route B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2 IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2 ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, a - Application O 2001:DB8:9A:10AA::1/128 [110/1] via FE80::2ED0:2DFF:FE90:2440, Serial0/0/1 C 2001:DB8:ABCD:10::/64 [0/0] via Serial0/0/0, directly connected L 2001:DB8:ABCD:10::2/128 [0/0] via Serial0/0/0, receive C 2001:DB8:ABCD:20::/64 [0/0] via Serial0/0/1, directly connected L 2001:DB8:ABCD:20::1/128 [0/0] via Serial0/0/1, receive C 2001:DB8:ABCD:100::/64 [0/0] via Loopback1, directly connected L 2001:DB8:ABCD:100::1/128 [0/0] via Loopback1, receive D 2001:DB8:CAFE:10::/64 [90/2297856] via FE80::1, Serial0/0/0 C 2001:DB8:CAFE:100::/64 [0/0] via Loopback0, directly connected L 2001:DB8:CAFE:100::1/128 [0/0] via Loopback0, receive L FF00::/8 [0/0] via Null0, receive R2# R3#show running-config Building configuration... Current configuration : 5699 bytes ! ! Last configuration change at 06:31:38 UTC Wed Nov 14 2029 ! version 15.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname R3 ! boot-start-marker boot-end-marker ! ! ! no aaa new-model ! ! ! ! ! ! ! ! ! ! ! ! ! ! no ip domain lookup ip cef ipv6 unicast-routing ipv6 cef multilink bundle-name authenticated ! cts logging verbose ! ! license udi pid CISCO1941/K9 sn FCZ212540CR ! ! ! redundancy ! ! ! ! ! ! interface Loopback0 no ip address ipv6 address 2001:DB8:9A:10AA::1/64 ipv6 ospf 1 area 0 ! interface Loopback20 ip address 172.26.20.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback21 ip address 172.26.21.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback22 ip address 172.26.22.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback23 ip address 172.26.23.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback24 no ip address ip ospf network point-to-point ! interface Loopback25 no ip address ip ospf network point-to-point ! interface Loopback26 no ip address ip ospf network point-to-point ! interface Loopback27 no ip address ip ospf network point-to-point ! interface Loopback28 no ip address ip ospf network point-to-point ! interface Loopback29 no ip address ip ospf network point-to-point ! interface Loopback30 no ip address ip ospf network point-to-point ! interface Loopback31 no ip address ip ospf network point-to-point ! interface Loopback32 no ip address ip ospf network point-to-point ! interface Loopback33 no ip address ip ospf network point-to-point ! interface Loopback34 no ip address ip ospf network point-to-point ! interface Loopback35 no ip address ip ospf network point-to-point ! interface Loopback36 no ip address ip ospf network point-to-point ! interface Loopback37 no ip address ip ospf network point-to-point ! interface Loopback38 no ip address ip ospf network point-to-point ! interface Loopback39 no ip address ip ospf network point-to-point ! interface Loopback40 ip address 192.168.40.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback41 no ip address ip ospf network point-to-point ! interface Loopback42 no ip address ip ospf network point-to-point ! interface Loopback43 no ip address ip ospf network point-to-point ! interface Loopback44 no ip address ip ospf network point-to-point ! interface Loopback45 ip address 192.168.45.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback46 no ip address ip ospf network point-to-point ! interface Loopback47 no ip address ip ospf network point-to-point ! interface Loopback48 no ip address ip ospf network point-to-point ! interface Loopback49 no ip address ip ospf network point-to-point ! interface Loopback50 ip address 192.168.50.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback51 no ip address ip ospf network point-to-point ! interface Loopback52 no ip address ip ospf network point-to-point ! interface Loopback53 no ip address ip ospf network point-to-point ! interface Loopback54 no ip address ip ospf network point-to-point ! interface Loopback55 ip address 192.168.55.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback56 no ip address ip ospf network point-to-point ! interface Loopback57 no ip address ip ospf network point-to-point ! interface Loopback58 no ip address ip ospf network point-to-point ! interface Loopback59 no ip address ip ospf network point-to-point ! interface Loopback60 ip address 192.168.60.1 255.255.255.0 ip ospf network point-to-point ! interface Loopback61 no ip address ip ospf network point-to-point ! interface Loopback62 no ip address ip ospf network point-to-point ! interface Loopback63 no ip address ip ospf network point-to-point ! interface Loopback64 no ip address ip ospf network point-to-point ! interface Loopback65 ip address 192.168.65.1 255.255.255.0 ip ospf network point-to-point ! interface Embedded-Service-Engine0/0 no ip address shutdown ! interface GigabitEthernet0/0 no ip address shutdown duplex auto speed auto ! interface GigabitEthernet0/1 no ip address shutdown duplex auto speed auto ! interface Serial0/0/0 description Link to R2 bandwidth 128000 ip address 20.10.10.6 255.255.255.252 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco ipv6 enable ipv6 ospf 1 area 0 ! interface Serial0/0/1 no ip address shutdown clock rate 2000000 ! interface Serial0/1/0 no ip address shutdown clock rate 2000000 ! interface Serial0/1/1 no ip address shutdown clock rate 2000000 ! router ospf 1 router-id 3.3.3.3 summary-address 192.168.0.0 255.255.128.0 passive-interface default no passive-interface Serial0/0/0 network 20.10.10.4 0.0.0.3 area 0 network 172.26.20.0 0.0.0.255 area 26 network 172.26.21.0 0.0.0.255 area 26 network 172.26.22.0 0.0.0.255 area 26 network 172.26.23.0 0.0.0.255 area 26 network 192.168.40.0 0.0.0.255 area 175 network 192.168.45.0 0.0.0.255 area 175 network 192.168.50.0 0.0.0.255 area 175 network 192.168.55.0 0.0.0.255 area 175 network 192.168.60.0 0.0.0.255 area 175 network 192.168.65.0 0.0.0.255 area 175 ! ip forward-protocol nd ! no ip http server no ip http secure-server ! ! ipv6 router ospf 1 passive-interface default no passive-interface Serial0/0/0 ! ! ! ! control-plane ! ! ! line con 0 logging synchronous line aux 0 line 2 no activation-character no exec transport preferred none transport output pad telnet rlogin lapb-ta mop udptn v120 ssh stopbits 1 line vty 0 4 login transport input none ! scheduler allocate 20000 1000 ! end R3#ah R3#ahw R3#aho R3#sh R3#show ip int R3#show ip interface br R3#show ip interface brief Interface IP-Address OK? Method Status Protocol Embedded-Service-Engine0/0 unassigned YES unset administratively down down GigabitEthernet0/0 unassigned YES unset administratively down down GigabitEthernet0/1 unassigned YES unset administratively down down Serial0/0/0 20.10.10.6 YES manual up up Serial0/0/1 unassigned YES unset administratively down down Serial0/1/0 unassigned YES unset administratively down down Serial0/1/1 unassigned YES unset administratively down down Loopback0 unassigned YES unset up up Loopback20 172.26.20.1 YES manual up up Loopback21 172.26.21.1 YES manual up up Loopback22 172.26.22.1 YES manual up up Loopback23 172.26.23.1 YES manual up up Loopback24 unassigned YES unset up up Loopback25 unassigned YES unset up up Loopback26 unassigned YES unset up up Loopback27 unassigned YES unset up up Loopback28 unassigned YES unset up up Loopback29 unassigned YES unset up up Loopback30 unassigned YES unset up up Loopback31 unassigned YES unset up up Loopback32 unassigned YES unset up up Loopback33 unassigned YES unset up up Loopback34 unassigned YES unset up up Loopback35 unassigned YES unset up up Loopback36 unassigned YES unset up up Loopback37 unassigned YES unset up up Loopback38 unassigned YES unset up up Loopback39 unassigned YES unset up up Loopback40 192.168.40.1 YES manual up up Loopback41 unassigned YES unset up up Loopback42 unassigned YES unset up up Loopback43 unassigned YES unset up up Loopback44 unassigned YES unset up up Loopback45 192.168.45.1 YES manual up up Loopback46 unassigned YES unset up up Loopback47 unassigned YES unset up up Loopback48 unassigned YES unset up up Loopback49 unassigned YES unset up up Loopback50 192.168.50.1 YES manual up up Loopback51 unassigned YES unset up up Loopback52 unassigned YES unset up up Loopback53 unassigned YES unset up up Loopback54 unassigned YES unset up up Loopback55 192.168.55.1 YES manual up up Loopback56 unassigned YES unset up up Loopback57 unassigned YES unset up up Loopback58 unassigned YES unset up up Loopback59 unassigned YES unset up up Loopback60 192.168.60.1 YES manual up up Loopback61 unassigned YES unset up up Loopback62 unassigned YES unset up up Loopback63 unassigned YES unset up up Loopback64 unassigned YES unset up up Loopback65 192.168.65.1 YES manual up up R3#sh R3#show ip rou R3#show ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override Gateway of last resort is 20.10.10.5 to network 0.0.0.0 O*E2 0.0.0.0/0 [110/1] via 20.10.10.5, 00:33:25, Serial0/0/0 20.0.0.0/8 is variably subnetted, 3 subnets, 2 masks O E2 20.10.10.0/30 [110/20] via 20.10.10.5, 00:48:31, Serial0/0/0 C 20.10.10.4/30 is directly connected, Serial0/0/0 L 20.10.10.6/32 is directly connected, Serial0/0/0 172.16.0.0/17 is subnetted, 1 subnets O E2 172.16.0.0 [110/20] via 20.10.10.5, 00:36:38, Serial0/0/0 172.26.0.0/16 is variably subnetted, 8 subnets, 2 masks C 172.26.20.0/24 is directly connected, Loopback20 L 172.26.20.1/32 is directly connected, Loopback20 C 172.26.21.0/24 is directly connected, Loopback21 L 172.26.21.1/32 is directly connected, Loopback21 C 172.26.22.0/24 is directly connected, Loopback22 L 172.26.22.1/32 is directly connected, Loopback22 C 172.26.23.0/24 is directly connected, Loopback23 L 172.26.23.1/32 is directly connected, Loopback23 192.168.40.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.40.0/24 is directly connected, Loopback40 L 192.168.40.1/32 is directly connected, Loopback40 192.168.45.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.45.0/24 is directly connected, Loopback45 L 192.168.45.1/32 is directly connected, Loopback45 192.168.50.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.50.0/24 is directly connected, Loopback50 L 192.168.50.1/32 is directly connected, Loopback50 192.168.55.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.55.0/24 is directly connected, Loopback55 L 192.168.55.1/32 is directly connected, Loopback55 192.168.60.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.60.0/24 is directly connected, Loopback60 L 192.168.60.1/32 is directly connected, Loopback60 192.168.65.0/24 is variably subnetted, 2 subnets, 2 masks C 192.168.65.0/24 is directly connected, Loopback65 L 192.168.65.1/32 is directly connected, Loopback65 R3#sh R3#show ipv R3#show ipv6 int R3#show ipv6 interface br R3#show ipv6 interface brief Em0/0 [administratively down/down] unassigned GigabitEthernet0/0 [administratively down/down] unassigned GigabitEthernet0/1 [administratively down/down] unassigned Serial0/0/0 [up/up] FE80::2ED0:2DFF:FE90:2440 Serial0/0/1 [administratively down/down] unassigned Serial0/1/0 [administratively down/down] unassigned Serial0/1/1 [administratively down/down] unassigned Loopback0 [up/up] FE80::2ED0:2DFF:FE90:2440 2001:DB8:9A:10AA::1 Loopback20 [up/up] unassigned Loopback21 [up/up] unassigned Loopback22 [up/up] unassigned Loopback23 [up/up] unassigned Loopback24 [up/up] unassigned Loopback25 [up/up] unassigned Loopback26 [up/up] unassigned Loopback27 [up/up] unassigned Loopback28 [up/up] unassigned Loopback29 [up/up] unassigned Loopback30 [up/up] unassigned Loopback31 [up/up] unassigned Loopback32 [up/up] unassigned Loopback33 [up/up] unassigned Loopback34 [up/up] unassigned Loopback35 [up/up] unassigned Loopback36 [up/up] unassigned Loopback37 [up/up] unassigned Loopback38 [up/up] unassigned Loopback39 [up/up] unassigned Loopback40 [up/up] unassigned Loopback41 [up/up] unassigned Loopback42 [up/up] unassigned Loopback43 [up/up] unassigned Loopback44 [up/up] unassigned Loopback45 [up/up] unassigned Loopback46 [up/up] unassigned Loopback47 [up/up] unassigned Loopback48 [up/up] unassigned Loopback49 [up/up] unassigned Loopback50 [up/up] unassigned Loopback51 [up/up] unassigned Loopback52 [up/up] unassigned Loopback53 [up/up] unassigned Loopback54 [up/up] unassigned Loopback55 [up/up] unassigned Loopback56 [up/up] unassigned Loopback57 [up/up] unassigned Loopback58 [up/up] unassigned Loopback59 [up/up] unassigned Loopback60 [up/up] unassigned Loopback61 [up/up] unassigned Loopback62 [up/up] unassigned Loopback63 [up/up] unassigned Loopback64 [up/up] unassigned Loopback65 [up/up] unassigned R3# sh R3# show ipv R3# show ipv6 rou R3# show ipv6 route IPv6 Routing Table - default - 8 entries Codes: C - Connected, L - Local, S - Static, U - Per-user Static route B - BGP, R - RIP, I1 - ISIS L1, I2 - ISIS L2 IA - ISIS interarea, IS - ISIS summary, D - EIGRP, EX - EIGRP external ND - ND Default, NDp - ND Prefix, DCE - Destination, NDr - Redirect O - OSPF Intra, OI - OSPF Inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2 ON1 - OSPF NSSA ext 1, ON2 - OSPF NSSA ext 2, a - Application C 2001:DB8:9A:10AA::/64 [0/0] via Loopback0, directly connected L 2001:DB8:9A:10AA::1/128 [0/0] via Loopback0, receive OE2 2001:DB8:ABCD:10::/64 [110/20] via FE80::2, Serial0/0/0 O 2001:DB8:ABCD:20::/64 [110/2] via FE80::2, Serial0/0/0 O 2001:DB8:ABCD:100::1/128 [110/1] via FE80::2, Serial0/0/0 OE2 2001:DB8:CAFE:10::/64 [110/20] via FE80::2, Serial0/0/0 O 2001:DB8:CAFE:100::1/128 [110/1] via FE80::2, Serial0/0/0 L FF00::/8 [0/0] via Null0, receive R3#