Title: DECbrouter90 V914/V10 IP Integrated IS-IS redistributed into RIP Product: DECbrouter90 V9.14/V10.x Question: How do I configure the DECbrouter90 to redistribute Integrated IS-IS routing information into RIP packets, so that unix hosts on the LAN can learn about the remote networks? Solution: This is an example of how to configure the DBR90s to run RIP on the LAN circuits and Int IS-IS on the WAN circuits. Int IS-IS is redistributed into RIP for advertisement to the IP hosts. In this example there are no other Int IS-IS routers on the LANs, just WAN connections. NOTE: A minimum version of DECbrouter90 V9.14.6-3 is required for Integrated IS-IS to work properly. --------------- | IP HOST | | routed -q | | Network | | 3.135.18.1 | | Mask | |255.255.255.0| --------------- | Ethernet RIP only ---------------------------------------------------------------------- | | E0 ---------------------------------------------------------------------- | DECbrouter 90 | |hostname BRUTH | |! | |clns routing | |! | |!Enables CLNS routing protocol (IS-IS) | |! | |interface Ethernet 0 | |ip address 3.135.18.2 255.255.255.0 | |! | |! Enables RIP on Interface Ethernet 0 | |! | |ip router isis | |! | |! Enables Int IS-IS on Interface Ethernet 0 | |! | |interface Serial 0 | |ip unnumbered Ethernet0 | |! | |! IP unnumbered or IP address required for IP routing to use this | |! interface | |no keepalive | |ip router isis | |! | |! Enables Int IS-IS on Interface Serial 0. You must either have IP | |! unnumbered or an IP address for this command to work. | |! | |router rip | |network 3.0.0.0 | |! | |! Enables RIP for network 3.0.0.0 | |! | |default-metric 2 | |! | |! Used to set all routes redistributed from IS-IS to a metric of 2. | |! If not used RIP will see IS-IS routes as not reachable because the| |! metric will be above 15. | |! | |redistribute isis | |! | |! Redistribute Int IS-IS routes into RIP | |! | |passive-interface Serial0 | |! | |! This is required so that there are no routing loops created. | |! This will prevent RIP from being sent or received across serial 0.| |! We need to do this because of the IP unnumbered or IP address with| |! the same network as RIP. | |! | |router isis | |net 49.0003.0800.2BA1.4434.00 | |! | |! Enables the Int IS-IS routing protocol for | |! net 49.0003.0800.2BA1.4434.00 | |! | |passive-interface Ethernet0 | |! | |! This is required so that there are no routing loops created. | |! In this example RIP is run on the LANs and Int IS-IS on the WANs. | |! This will prevent Int IS-IS from being sent or received across | |! ethernet 0. We need to enable Int IS-IS on the ethernet so that | |! the network or subnet configured on the ethernet is advertised by | |! Int IS-IS across the WAN. | |! | ---------------------------------------------------------------------- \ S0 / \ / S0 ---------------------------------------------------------------------- | DECbrouter 90 | |hostname BRUTG | |! | |clns routing | |! | |!Enables CLNS routing protocol (IS-IS) | |! | |interface Ethernet 0 | |ip address 16.135.16.1 255.255.255.0 | |! | |! Enables RIP on Interface Ethernet 0 | |! | |ip router isis | |! | |! Enables Int IS-IS on Interface Ethernet 0 | |! | |interface Serial 0 | |ip unnumbered Ethernet0 | |! | |! IP unnumbered or IP address required for IP routing to use this | |! interface | |no keepalive | |ip router isis | |! | |! Enables Int IS-IS on Interface Serial 0. You must either have IP | |! unnumbered or an IP address for this command to work. | |! | |router rip | |network 16.0.0.0 | |! | |! Enables RIP for network 16.0.0.0 | |! | |default-metric 2 | |! | |! Used to set all routes redistributed from IS-IS to a metric of 2. | |! If not used RIP will see IS-IS routes as not reachable because the| |! metric will be above 15. | |! | |redistribute isis | |! | |! Redistribute Int IS-IS routes into RIP | |! | |passive-interface Serial0 | |! | |! This is required so that there are no routing loops created. | |! This will prevent RIP from being sent or received across serial 0.| |! We need to do this because of the IP unnumbered or IP address with| |! the same network as RIP. | |! | |router isis | |net 49.0003.0800.2BA1.F952.00 | |! | |! Enables the Int IS-IS routing protocol for | |! net 49.0003.0800.2BA1.F952.00 | |! | |passive-interface Ethernet0 | |! | |! This is required so that there are no routing loops created. | |! In this example RIP is run on the LANs and Int IS-IS on the WANs. | |! This will prevent Int IS-IS from being sent or received across | |! ethernet 0. We need to enable Int IS-IS on the ethernet so that | |! the network or subnet configured on the ethernet is advertised by | |! Int IS-IS across the WAN. | |! | ---------------------------------------------------------------------- | E0 | Ethernet RIP only ---------------------------------------------------------------------- | --------------- | IP HOST | | routed -q | | Network | | 16.135.16.2 | | Mask | |255.255.255.0| --------------- BRUTH#show ip route show ip route Codes: I - IGRP derived, R - RIP derived, H - HELLO derived, O - OSPF derived C - connected, S - static, E - EGP derived, B - BGP derived i - IS-IS derived * - candidate default route, IA - OSPF inter area route E1 - OSPF external type 1 route, E2 - OSPF external type 2 route L1 - IS-IS level-1 route, L2 - IS-IS level-2 route Gateway of last resort is not set 3.0.0.0 is subnetted (mask is 255.255.255.0), 1 subnets C 3.135.18.0 is directly connected, Ethernet0 16.0.0.0 is subnetted (mask is 255.255.255.0), 1 subnets i L1 16.135.16.0 [115/20] via 16.135.16.1, 0:05:34, Serial0 BRUTG#show ip route show ip route Codes: I - IGRP derived, R - RIP derived, H - HELLO derived, O - OSPF derived C - connected, S - static, E - EGP derived, B - BGP derived i - IS-IS derived * - candidate default route, IA - OSPF inter area route E1 - OSPF external type 1 route, E2 - OSPF external type 2 route L1 - IS-IS level-1 route, L2 - IS-IS level-2 route Gateway of last resort is not set 3.0.0.0 is subnetted (mask is 255.255.255.0), 1 subnets i L1 3.135.18.0 [115/20] via 3.135.18.2, 0:05:27, Serial0 16.0.0.0 is subnetted (mask is 255.255.255.0), 1 subnets C 16.135.16.0 is directly connected, Ethernet0