Rip 1 Across Differents Vlans

[Mauro Rovedo]

Hello ! I've got headache to try to solve a lab .

The situation include 2 cisco routers an 2 switch 3550

so we have  Router A  in Vlan x access ----->Sw1----Trunk----Sw2<------Vlan y Access Router B

I 've to enable rip1 on guys A and B ONLY !!! Avoiding any kind of tunnel

I though it was all around fallBAck bridging ... but after days of tries .... i dont have found any solution ...

May you have any kind of idea ?Better solution

Ty !

[cadet alain]

Hi,

configure sw1-sw2 as access port in same vlan rtrA and sw2-sw1 as access port in same vlan as rtrB then under RIP process on each router configure no validate-update-source and it should work.

EDIT:  I tried it and the rip routes were propagated indeed but there is a recursive lookup problem due to ARP and it won't work even with static arp entries

so finally not a valid solution for your problem. Gonna think  it over and if I find something working without a tunnel I'll let you know

EDIT2:  configure ip mobile arp on both routers fastethernet then shut/no shut the interface and it iwill work, I've tried it on GNS3.

but I didn't use a trunk link between the 2 switches but configuring the other end access vlan as native vlan on each switch should do the trick with

the trunk link.

Regards.

Alain.

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[Mauro Rovedo]

Halo Just updates the info about LAb

RTB SERVER DHCP PPPOE ------>FA/0 (172.16.100.1) both access vlan 100  BVi interface bridge

                                                      ------>FA/1

RTC Client DHCP PPPOE FA/0 Access VLan 100

Between those guys we SW1 ------ Trunk ------ Sw2

RTD SErver DHCP PPPOE ------- FA0/1 both access vlan 130  (172.16.130.1)  BVI interface bridge                                         --                                                      --                                                     --FA0/0

Between those guys we SW1 ------ Trunk ------ Sw2

RTE Client DHCP PPPOE FA0/0 Access Vlan 130

At thi point i 've to configure w/0 any kind o tunnel a ripv1 session Between RTE And RTC....

BEing a point to point , when i do debug ip rip ...see ofc my dialer 1 send ip to BVI that discard it because it does not hase any FIB lookup ruting.

THis if i left rip in Broadcast ....if i dgt neighobor x.x.x.x it does not work anyway

Using no validate-update under rip process...also

ANy suggestion

Ty in advice ...

[cadet alain]

Hi,

have you tried the solution I posted before because I tested it in GNS3 and it worked, it should even work without the mobile arp but just configuring static arp entries for each RIP router and shutting/no shutting the interfaces.

Regards.

Alain

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