Nexus 5000 ISSU supported topology

[ivan widjaja]

Hi

can anyone tell me the difference between figure 1-8 and figure 1-14 in this document?

http://www.cisco.com/en/US/docs/switches/datacenter/nexus5000/sw/upgrade/521_N1_1/n5k_upgrade_downgrade_521.html#wp641009

fig 1-8 is supported topolgy in ISSU

but not fig 1-14.

i do not see the difference in topology from N5k point of view.

Thank you,

ivan

[danrya · Accepted solution]

The 2 5K's are not attached to any upstream switches.  Therefore the N5K must be the Spanning-tree root of the topology and thus ISSU is not supported.

To support ISSU on the N5K, the 5K's can not be root for any VLAN, and all 5K interfaces must be Root port or Edge port.  So, no switches attached to the N5K's except the root VPC north bound.

Dan Ryan, NCE

Cisco Systems, Inc

[ivan widjaja]

Thanks Dan!

how about if in figure 1-8, blade switches is connected directly to N5K ports with VPC.

Since the requirement is no STP in running to downstream switch,

is it mean i need to define the VPC as stp type edge trunk and filter BPDU?

which means the blade switch will run its own STP and become the root itself?

or this kind of topology is not supported for ISSU?

Thanks,

Ivan