If you take the IRB approach I think that something like this would work - and only one bridge group.
Router A config: hostname RouterA ! ip cef bridge irb ! frame-relay switching ! interface FastEthernet0/0 duplex auto speed auto bridge-group 1 ! interface Serial0/0 no ip address encapsulation frame-relay IETF no fair-queue ! interface Serial0/0.1 point-to-point ip address 172.20.0.1 255.255.255.252 frame-relay interface-dlci 100 ! interface Serial0/0.2 point-to-point frame-relay interface-dlci 101 bridge-group 1 ! interface BVI1 ip address 5.6.7.8 255.255.255.0 ! bridge 1 protocol ieee bridge 1 route ip ################################ Router B config: hostname RouterB bridge irb ! frame-relay switching ! interface Ethernet0/0 no ip address bridge-group 1 ! interface Serial0/0 no ip address encapsulation frame-relay IETF no fair-queue frame-relay intf-type dce ! interface Serial0/0.1 point-to-point ip address 172.20.0.2 255.255.255.252 frame-relay interface-dlci 100 ! interface Serial0/0.2 point-to-point frame-relay interface-dlci 101 bridge-group 1 ! interface BVI1 ip address 5.6.7.7 255.255.255.0 (need another address in this network) ! bridge 1 protocol ieee bridge 1 route ip ################################ PC is set to 5.6.7.9/30[not 30]. [PC needs to know gateway address of 5.6.7.8] Rich >> Hi all, >> >> I am trying to configure bridging via t1 on two cisco 2600's sitting back to >> back. Here is a brief outline of what I am trying to accomplish: >> >> Router A: >> FE 0/0: 1.2.3.4/24 (publicly routable) >> S0/0: encapsulation frame relay >> S0/0.1 ptp: 172.20.0.1/30 dlci 100 >> S0/0.2 ptp: 5.6.7.8/30 (peering address) dlci 101 bridge-group 2 >> > >Does it have to be frame relay? What you need here is PPP Half-bridging. > >http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_ example09186a0080093c80.shtml > >Your other choice would be to use Integrated Routing and Bridging. > >http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_configu ration_guide_chapter09186a00800ca767.html#wp1041949 > >> Router B: >> FE 0/0: no ip - bridged ethernet connection - bridge-group 2 >> S0/0: encapsulation frame relay >> S0/0.1 ptp: 172.20.0.2/30 dlci 100 bridge-group 1 >> S0/0.2 ptp: unnumbered - bridged to ethernet bridge-group 2 >> > >You need to disable IP routing here because IOS does not bridge IP just >because no IP addresses are applied to an interface. > >> PC: >> ETH: 5.6.7.9/30 connected to Router B FE 0/0. >> >> >> My serial and sub interfaces come up. I am able to ping from Router A to >> 172.20.0.2, and ping from Router B to 172.20.0.1. I cannot however ping >> from the PC at 5.6.7.9 to Router A 5.6.7.8. >> >> I can see the routes being installed in router A for both interfaces (0.1 >> and 0.2). >> >> Can someone tell me what step I am missing to forward the packets on Router >> B from the FE 0/0 interface and have them go across S0/0.2 to hit Router A >> on S0/0.2? >> >> >> Here are the relevant configs: >> >> Router A config: >> >> hostname RouterA >> ! >> ip cef >> ! >> frame-relay switching >> ! >> interface FastEthernet0/0 >> ip address 1.2.3.4 255.255.255.0 >> duplex auto >> speed auto >> bridge-group 1 >> ! >> interface Serial0/0 >> no ip address >> encapsulation frame-relay IETF >> no fair-queue >> bridge-group 1 >> ! >> interface Serial0/0.1 point-to-point >> ip address 172.20.0.1 255.255.255.252 >> frame-relay interface-dlci 100 >> bridge-group 1 >> ! >> interface Serial0/0.2 point-to-point >> ip address 5.6.7.8 255.255.255.252 >> frame-relay interface-dlci 101 >> ! >> bridge 1 protocol ieee >> bridge 2 protocol ieee >> >> ################################ >> >> Router B config: >> >> hostname RouterB >> ! >> frame-relay switching >> ! >> interface Ethernet0/0 >> no ip address >> bridge-group 2 >> ! >> interface Serial0/0 >> no ip address >> encapsulation frame-relay IETF >> no fair-queue >> frame-relay intf-type dce >> bridge-group 1 >> ! >> interface Serial0/0.1 point-to-point >> ip address 172.20.0.2 255.255.255.252 >> frame-relay interface-dlci 100 >> bridge-group 1 >> ! >> interface Serial0/0.2 point-to-point >> frame-relay interface-dlci 101 >> bridge-group 2 >> ! >> bridge 1 protocol ieee >> bridge 2 protocol ieee >> >> ################################ >> >> PC is set to 5.6.7.9/30. >> >> >> >> Thanks, >> _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
