I am trying to investigate the packet flow through the UCS. Each Interconnect is connected with vPC to two Nexus 5000 switches. I would like to check which vPC interface will be used by the Interconnect to send the traffic to the other host.
I've checked the port-channel load balancing algorithm and it seems to be configured with "ip and mac address hash".
UCS-B(nxos)# sh port-channel load-balance
Port Channel Load-Balancing Configuration: System: source-dest-ip
Port Channel Load-Balancing Addresses Used Per-Protocol: Non-IP: source-dest-mac IP: source-dest-ip source-dest-mac
When I tried to check the packet flow I received a following output
UCS-B(nxos)# show port-channel load-balance forwarding-path interface port-channel 10 src-ip 192.168.40.17 src-mac 0050.5688.05b3 dst-ip 192.168.40.19 dst-mac 0050.5688.17a9 Missing params will be substituted by 0's. Load-balance Algorithm: source-dest-ip crc8_hash: 77 Outgoing port id: Ethernet1/20
As you can see, both algorithms are not the same. The question is, which one will be used for the traffic living interconnect?
Moquery is the command line cousin of Vizore, it's very helpful and efficient sometimes during the troubleshooting. This article aims to provide moquery cheat sheet to the users for some most common seen scenarios.
Here is the checklist before customers/partners contact Cisco TAC:
Firmware Version of APIC and Switch
Download Switch and APIC techsupport logs
Problem description (Symptoms with details)
Business impact (eg, what kind of services...
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