HSRP Interface Tracking

limtohsoon · ‎06-07-2007

Hi Sir,

I'm configuring HSRP interface tracking feature. I use the track object method, as follows:

!

track 1 interface s0/0/0 line-protocol

!

interface FastEthernet0/0

standby 1 track 1 decrement 20

!

What's the difference if I configure the track object using the "ip routing" keywords instead, as follows:

!

track 1 interface s0/0/0 ip routing

!

In both cases, if interface s0/0/0 is down, it will trigger HSRP to reduce the priority by 20.

My understanding is, if only tracking of line protocol is required, we can configure the following method:

!

int fa 0/0

standby 1 track s0/0/0 20

!

Please advise.

Thank you.

B.Rgds,

Lim TS

uvaraj · ‎06-07-2007

Hi,

If you configure "track 1 interface s0/0/0 line-protocol" it will check only the interface line status ie layer2 issues.

If you configure "track 1 interface s0/0/0 ip routing" it will check the layer3 issues routing issues.

Regards

Uvaraj

limtohsoon · ‎06-07-2007

Hi,

What type of routing issues associated with the interface? Neighbor adjacencies (e.g. OSPF, EIGRP)? What about if static routing is used instead? Or RIP?

Thank you.

B.Rgds,

Lim TS

royalblues · ‎06-08-2007

Friend,

A tracked IP-route object is considered up and reachable when a routing-table entry exists for the route and the route is not inaccessible be it any routing protocol or even static.

have a look at this link

http://www.cisco.com/en/US/products/ps6566/products_feature_guide09186a008063c9bf.html#wp1047054

HTH, rate if it does

Narayan

limtohsoon · ‎06-10-2007

Hi Narayan,

Thanks for the info. I know the command "track ip route".

However, my original question is about the difference between the following two commands:

track 1 interface line-protocol

track 1 interface ip routing

Thank you.

B.Rgds,

Lim TS