load-balance bridged protocols between 3600 & dual-6500s

[l-harvey]

I have dual 6513's(set-up for resilience) at my core. At this time I route IP,IPX and bridge( the OSLAN protocol, there is only one bridge-group, on my network(for an ICL mainframe)). I wish to connect a link from my Aggregation routers (3640s) to each 6513. I can and works for IP and IPX but I get STP issues when both ports have bridge-group 1 enabled.

I have tried different bridge-groups but as I have only one interfaced M/F on one VLAN, I can't have two bridge-groups together on the same VLAN.

6513\

|||| 3640--2600

6513/

[didyap · Accepted solution]

Here's the link to the spanning tree support page. Take a look at the troubleshooting section. might help.

http://www.cisco.com/pcgi-bin/Support/browse/psp_view.pl?p=Technologies:Spanning_Tree&viewall=true