HSRP and Spanningtree

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Nov 1st, 2001
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I have configured HSRP on two Cat4006 and when I activate the redundant link I get a Dupaddress error. I know this is a spanningtree issue. I have made my active switch the bridge root and the second switch the secondary but I still get loop errors. Should I place everyting except the bridge root in blocking state?

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jscinocca Thu, 11/01/2001 - 10:08
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how many connections do you have between the two switches. If you have more than one then you have to trunk the connections. Or you will create a layer two loop. And that is what you are experiencing

c.favalora Thu, 11/01/2001 - 10:24
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I do not have a physical connection between the two switches. Do I need a connection between them?

jscinocca Thu, 11/01/2001 - 10:45
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as long as they can see each other.

but mainly they have a link between them, all really depends on your design

cahillrobert Thu, 11/01/2001 - 10:57
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I have a similiar situation between a 6509 and 4006, however there is a trunk riding over dual gig connections.

The config for the 6509, acting as primary is:

interface Vlan215


ip address 172.xxx.xxx.254

ip ospf priority 10

no cdp enable

standby 215 priority 105 preempt

standby 215 ip 172.xxx.xxx.1

The config for the 4006, acting as fail-over is:

interface Port-channel1.215

description IDX Vlan

encapsulation dot1Q 215

ip address 172.xxx.xxx.253

no ip redirects

no ip directed-broadcast

ip ospf cost 10

ip ospf priority 5

standby 215 ip 172.xxx.xxx.1

You need some linkage between the two routers, otherwise Standby will not see the status of the primary and assume it.


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