Stan,
Trunk your 6509's, ISL/On. Don't use spanning tree between your Switches.
HSRP between your MSFC Cards will suffice. Can you post your configs, I'm
sure we can help.
Thanks.
-Scott
""Rossetti, Stan"" <[EMAIL PROTECTED]> wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Could someone tell me if they have seen this problem before or have any
> suggestions.
>
> Scenario:
>
> We have 2 6509 switches with msfc cards in each on the 1st floor and 4th
> floor of a building. We have redundant links between the switches and
each
> switch has redundant sup 1 cards with the msfc blades. We also have 2
more
> 6509 switches on the 2nd and 3rd floors of the same building. The first
> floor switch is connected to the outside world through a 7206 router.
There
> are multiple vlan across each switch that are connected to the user
through
> several 3500 series switches on each floor. When we first turned HSRP on,
> the msfc1 vlans did not come up. We get Cisco online and they said we had
a
> bad msfc card. So we switched over to the redundant msfc card (msfc2).
The
> vlans came up and hsrp between the switches was working (exchange hello
> packets and send standby info). Each vlan knew of the other vlan standby
> router and ip address. To run a test we disabled our connection to the
> outside world to localize any problems and brought up continuous ping
> sessions between the switches and vlans on the 1st and 4th. Next we shut
> down the 1st floor switch. (Note: The 1st floor switch has the higher
> priority). The network went down and hsrp did no swap over to the standby
> switch. Additionally, when we disconnect the cable between the 1st floor
> and 4th floor switch we see duplicate ip address errors. We saw the same
> duplicate ip errors the last time we disconnected the cable between the
1st
> and 4th floor switches, but that was before we had hsrp installed.
>
> Some other useful info:
>
> About 3 weeks ago, before we installed the 1st floor switch the 4th floor
> switch acted as the interface to the outside world through the msfc card
> that cisco now says is bad. Then we installed the 1st floor switch and
move
> all connections through the 1st floor switch. Essentially the 1st floor
> switch became the interface to the outside world with redundant link to
the
> 4th floor and 2nd floor switch. When we did this the vlan could not talk
to
> each other. Which means that we could ping the msfc card from the outside
> world but not the 6509 switch. Internally, we could ping the 6509 switch,
> but not the outside world. To isolate the problem we removed the
connection
> to the 1st and 4th floor switches like we did above and everything came
up,
> but we saw the same duplicate ip address errors. We did a hardware reset
of
> the switch and reconnected the 1st and 4th floor switches and everything
> started working correctly. Any ideas? This make no sense to me and
> installing HSRP should not be an 8 ordeal.
>
>
>
> Thanks,
>
> Stan Rossetti
>
>
> Russia Services Group
> Email: [EMAIL PROTECTED]
> Phone: (256) 544-5031
> Beeper: 544-1183 pin # 0112
>
> <<...>>
>
>
>
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