Problem with Catalyst 6500 and HP Auto Port Agregation protocol

Problem with Catalyst 6500 and HP Auto Port Agregation protocol

Post by kha.. » Sat, 09 Jul 2005 13:36:10


After upgrading software in my catalyst 6500 to version IOS 12.1(23)E3
i have  found out that all servers using APA in Lan Monitor mode
failed. APA is unable to be established. Standby NIC use speciall
frames in L2 to periodically check if the second NIC (active) if it is
still working, and it seems that after upgrade such frames do not pass
the switch. They get into the switch for sure, because there are MAC
addresses of the NIC`s in mac-address table, but when I sniff traffic
on the trunk connecting 2 CATALYST`S I don`t see them.
I do not know if it is a problem with software or anything else. If
anybody meet the same problem please let my know how to fix it.

Thx in advance


1. Catalyst 4006 and auto-port aggregation on hp-ux server

I have two backbone switch ( CAT 4006 ) interconnected through two Gigabits
Links ( Channel ).
I have an HP-UX server with 2 FastEthernet NIC, one connection on each
backbone switch. On the HP-UX I will use the Auto-Port Aggregation ( HA and
Load Ballancing ) Feature. When I activate the two NIC card I see that the
virtual MAC address negocaited between the two NIC card are flapping between
the two backbone switchs.
Does somebody have any experience with the HP APA solution in an
architecture with two backbone switchs and an connection on the two switchs



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