Track IP routes on 6509

aweise · ‎07-03-2012

We have a need to track specifc subnets on our two 6509s, running IOS version 12.2(18)SXF16. Basically, we want to do this:

track 1 192.168.0.0 255.255.255.252 reachability

track 2 192.168.1.0 255.255.255.252 reachability

However, the 6509 IOS only provides the option to track an interface. Is this a feature that's available in later IOS versions?

Is there another way to track these routes? The subnets are used for WAN links at a HQ and DR site and we are doing a specific PBR (sending all http/https traffic) using these subnets. If that WAN link goes down, we want to be able to utilize a backup WAN link to support that traffic.

siddhartham · ‎07-03-2012

You can use IP SLA to achieve your goal

ip sla 1

icmp-echo X.X.X.X ( IP address of ISP-1)

timeout 50 -- Time in msec to complete the IP SLA operation

frequency 3 --- number of pings it will send

ip sla schedule 1 start-time now life forever

track 1 rtr 1 reachability

ip route 0.0.0.0 0.0.0.0 Y.Y.Y.Y track 1

ip route 0.0.0.0 0.0.0.0 Z.Z.Z.Z 100

This will ping x.x.x.x and if it looses 3 pings then it will delete ip route 0.0.0.0 0.0.0.0 Y.Y.Y.Y from routing table and adds the following route ip route 0.0.0.0 0.0.0.0 Z.Z.Z.Z 100

Siddhartha

aweise · ‎07-03-2012

Unfortunately, ip sla isn't even an option in our IOS:

SWITCH(config)#ip ?

Global IP configuration subcommands:

[options removed]

sap Global IP Multicast SAP Commands

scp Scp commands

security Specify system wide security information

slb Server Load Balancing

source IP source

source-route Process packets with source routing header options

ssh Configure ssh options

sticky-arp Allow the creation of sticky ARP entries

subnet-zero Allow 'subnet zero' subnets

.

This is why I asked the original question (sorry, I forgot to mention that). I would have used ip sla, but since it's not available, I wondered if there was another option. Seems like we're limited with our options.

Thanks!