ucs 6454 40G uplinks to core and port channels

[tdubb123]

hi

i am trying to cable up trhe ucs 6454. I got 2 40G mopdules on port 53 and 54 on each fabric.

I got 2 core switches to connect therm to

FABRIC 1

port 53 ----> port 1 on Core switch A

Port 54 -----> port 1 on Core Switch B

FABRIC 2

port 53 ------> port 2 on Core Switch A

port 54 ------> port 2 on Core switch B

Is this correct cablingand how do i configure the port channels?

[balaji.bandi]

You can configure Layer2 Port-channel if this is nexus vpc you can configure mesh network :

https://www.cisco.com/c/dam/en/us/solutions/collateral/data-center-virtualization/unified-computing/white_paper_c11-692008.pdf

[tdubb123]

these will be trunked links carrying multiple vlans

[balaji.bandi]

possible, depends on requirement and other side switch capabilites. you should carry multple vlan to meet the requirement on virtual requirement.

[Steven Tardy]

Follow any Cisco CVD. Just googled this one:
+ https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/UCS_CVDs/flexpod_xseries_vmware_7u2.html

See sections:
+ Create Port Channels
+ Configure Port Channel Parameters

[tdubb123]

this is my diagram. do i need creatre port channels with single 40G link per fabric to each core?

i dont understasnd

[tdubb123]

i am confused how the port channel will be created on the core. if only 1 link per fabric is connected?

[Steven Tardy]

UCS uplink docs:

https://www.cisco.com/c/en/us/td/docs/unified_computing/ucs/ucs-manager/GUI-User-Guides/Network-Mgmt/4-2/b_UCSM_Network_Mgmt_Guide_4_2/b_UCSM_Network_Mgmt_Guide_chapter_011.html#concept_91D93C80D2B0462AB190A7F18CE60421

Are your core switches vPC/MC-LAG capable?

https://en.wikipedia.org/wiki/Multi-chassis_link_aggregation_group

If so, then follow the CVD to create:

1. First port-channel from FI-A to core1+core2
2. Second port-channel from FI-B to core1+core2

If not, then I would probably forget about port-channels and make each wire an individual uplink.
UCS will "pin" each vNICs to a single uplink (with multiple vNICs in multiple servers getting "pinned" across all uplinks) and fail over to remaining uplinks when one uplink goes down.

[tdubb123]

i looked at the cvd, why isnt po11 include E1/50? I onl;y see E1/49. should a po be at least 2 links?

[Steven Tardy]

From the upstream switch (pair) perspective there are two independent (vPC) port-channels.
One port-channel 11 to UCS FI-A.
One port-channel 12 to UCS FI-B.
Both upstream switches would have both vPC port-channels.

UCS Fabric Interconnects do NOT support back-to-back vPC where all 4 links would be in one single (vPC) port-channel.