From: Kelly Cobean (kcobean@xxxxxxxxxxxxx)
Date: Fri Jul 19 2002 - 10:35:37 GMT-3
Chenyan,
I'm assuming that this is your scenario...
Router 1 has 2 serial links and an HSRP interface, which is tracking both
serial links. Let's say his priority is 105, so he is the active router.
Router 2 has a serial interface and an HSRP interface and his priority is
the default of 100, so he is the standby.
If serial link #1 on router 1 goes down, then router 1 drops his priority to
95. Assuming that router 2 is configured to preempt, he will send a coup
message and assume ownership of the Virtual IP and MAC Address. Router 1
will no longer be receiving traffic destined for Off-LAN hosts (assuming
that you have disabled ICMP redirects, which I believe the newer IOS's don't
do by default like the old IOS's did) but it's serial link #2 will remain
up/up.
I'm guessing that what you probably want to do is set the priority of router
1 to 115, that way if serial link 1 drops, the priority drops to 105 and he
retains ownership of the Virtual IP. If serial link #2 drops, then the
priority drops to 95 and router 2 takes ownership of the virtual IP.
Make sure that router 1 is configured for preempt as well, otherwise when
it's serial links come back up, he won't perform the coup to become the
active router once again.
HTH,
Kelly Cobean, CCNP, CCSA, ACSA, MCSE, MCP+I
Network Engineer
AT&T Government Solutions, Inc.
Disclaimer:
The opinions expressed herein are those of the author alone, and do not
necessarily relfect those of AT&T Government Solutions, Inc., it's
management, or it's affiliates.
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
chenyan
Sent: Friday, July 19, 2002 3:54 AM
To: ccielab
Subject: hsrp track problem?
hi,guys,
when configging the hsrp track for more than one serial links, I got a
problem:
when one tracked serial link down, the active router will reduce it priority
by 10 default, if it's priority is less than the priority of standby router,
it is possible that the standby router will change to a active router? If it
does,
will the other tracked serial links of the original active router shutdown ?
will the traffic through the original good serial link be changed to flow
through the present active router?
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