I have a pair of Nexus 7010, with Sup1s and 3 x N7K-F132XP-15 (this will be replaced soon with sup2 and F3 cards) running 6.2(2). I currently have two pairs of Nexus 5548 connected through VPCs and everything is functioning as it should.
We have recently tried to add a new Nexus 5596UP to the mix. We aren't doing anything funny with the config, this is a straight VPC connection from the 7K to the 5K.
The issue we have is that the 5K sees all VLANs coming up to it with the associated MAC tables from the 7K, so it's receiving everything, but it does not transmit it's own MAC addresses back to the 7K. When looking at the interfaces, you see the receive amount increasing, but the transmit is almost nothing. We have tried everything we can think of to get the connection to work.
-Removed the VPC and went to a straight trunk port
-Rebuilt the VPC a dozen times
-Swap ports
-Swapped SFPs
The VPC comes up as it's supposed to, everything looks correct:
vPC status
----------------------------------------------------------------------------
id Port Status Consistency Reason Active vlans
------ ----------- ------ ----------- -------------------------- -----------
3 Po3 up success success 610-618,101
0,1012,1014
,1016,1018,
1020,1022-1
028,1030....
After clearing the counters, this is what the 5K interface shows, and the 7K just shows the opposite of course:
RX
5413 unicast packets 18009 multicast packets 5293 broadcast packets
28715 input packets 2370521 bytes
0 jumbo packets 0 storm suppression bytes
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
0 unicast packets 13 multicast packets 10 broadcast packets
23 output packets 7210 bytes
0 jumbo packets
0 output error 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
We have been on the phone with TAC, and they are at a loss.
As stated above, the
7K is running 6.2(2)
5K is running 6.0(7)
Has anyone seen anything like this before? Is there a limitation of the F1 cards and a newer 5K? is there a limit of VPCs on the SUP1?
Thank you for any help
