Need a hint for a real world taks.
Hi Victor,
Use enhanced object tracking in conjunction with the static route. Create an IP SLA instance that tracks ICMP Echo reachability to the far end of the link (R3’s Loopback). If the Loopback is unreachable the static route should be withdrawn. Here’s an example:
ip sla monitor 10 type echo protocol ipIcmpEcho 3.3.3.3 timeout 500 frequency 2 ip sla monitor schedule 10 start-time now ! track 1 rtr 10 ! ip route 0.0.0.0 0.0.0.0 10.0.0.1 track 1
This means that you will ping 3.3.3.3 every 2 seconds. If you don’t get a response within 500 milliseconds the default route to 10.0.0.1 will be withdrawn.
HTH,
Brian McGahan, CCIE #8593 bmcgahan@internetworkexpert.com
Internetwork Expert, Inc. http://www.InternetworkExpert.com Toll Free: 877-224-8987 x 705 Outside US: 775-826-4344 x 705 24/7 Support: http://forum.internetworkexpert.com Live Chat: http://www.internetworkexpert.com/chat/
> —–Original Message—– > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of > Victor Cappuccio > Sent: Saturday, July 29, 2006 5:10 PM > To: ccielab@groupstudy.com > Subject: RE: Need a hint for a real world taks. > > Ohhh sorry I forgot to say that R2 and R3 are non Cisco, so CDP is not > available also, in case off thinking of Route-maps with ip next-hop > values. > > > > _____ > > De: Victor Cappuccio [mailto:cvictor@protokolgroup.com] > Enviado el: Sabado, 29 de Julio de 2006 06:02 p.m. > Para: ‘ccielab@groupstudy.com’ > Asunto: Need a hint for a real world taks. > > > > Guys, > > > > What if we have 3 routers connected like in this: > > > > R1 ==A= Sw1 ==T== Sw2 =A==R2-L0 > > =A==R3-L0 > > > > A = Access > > T = Trunk > > > > If the ASCII diagram came mess up, R1 connects via Vlan X to Sw1 f0/1, sw1 > uses f0/13 to trunk with sw2 f0/13, sw2 connects with R2 using f0/2 and > with > R3 using f0/3 in Vlan X > > > > Please note that Im not allowed to use Dynamic Routing for this scenario > (real World Taks). > > > > So, I need to find a way other than using tunnels interfaces to get rid of > the static route create at R1, if R2 or R3 Ethernet goes down. Is there > anyway you can think to solve this task? The use on tunneling here is not > scalable (I think), because you will need more ip addressing from the > tunnels and more ip routes > > > > Any hint for this task please? > > > > Thanks > > Victor. > >
Category: CCIE Study
