vPC topologies
Its stated that in vPC topologies,
 Note |
Always attach all vPC devices using EtherChannels to both vPC peer devices. Would the connections to the FEX in the attached diagram be orphan ports? |
Its stated that in vPC topologies,
Note |
Always attach all vPC devices using EtherChannels to both vPC peer devices. Would the connections to the FEX in the attached diagram be orphan ports? |
Comments
Perhaps, in an attempt to answer my own question, the FEXs are considered as line cards, so logically, the server/downstream device is paired to two parent switches in what could be an active/standby configuration?
Consider N2K as a line card to Nexus5/7K. This is logially similar to a typical vpc topology, nothing really different.
In this scenario, the FEX connections are not orphan ports because they do not participate in a vPC. The FEX connections are normal port-channels, that is:
N5K1:
feature fex
feature lacp
interface Eth1/1-2
channel-group 100 mode active
interface Po100
switchport mode fex-fabric
fex associate 100
N5K2:
feature fex
feature lacp
interface Eth1/1-2
channel-group 101 mode active
interface Po101
switchport mode fex-fabric
fex associate 101
Note that neither of these confguraions have the command "vpc 100" or "vpc 101"
However, the host would be configured for either static or lacp aggregation and the N5Ks would be configured as followed (with vPC commands):
N5K1:
int Eth100/1/2
description Server
channel-group 10 mode active
int Po10
switchport access vlan 50
vpc 10
N5K1:
int Eth101/1/2
description Server
channel-group 10 mode active
int Po10
switchport access vlan 50
vpc 10