connect nexus 5k to hp 3800 via vPC

[Russell Gibbons]

As the title says, I am connecting a stack of 3800 switches to a Nexus 5K pair using a virtual Port Channel. However, the second connection never comes up, and in the one case we've had where connection 1 goes down, the second connection didn't take over. Is anyone out there doing this successfully?

Thanks,

Russell

             +------------+__________+------------+
             | Nexus 5K-1 |__________| Nexus 5K-2 |
             +------------+   vPC    +------------+
                   |                         |
                  c|                         |
                  o|                         |
                  n|                         |
                  n|                         |c
                   |      +------------+     |o
                  1+------| HP 3800-1  |     |n
                          +------------+     |n
                               |S|           |
                               |T|           |2
                               |A|           |
                               |C|           |
                               |K|           |
                         +------------+      |
                         | HP 3800-5  |------+
                         +------------+

HMMB5K-1# sh run int po101

!Command: show running-config interface port-channel101
!Time: Thu Mar 13 19:24:06 2014

version 5.0(2)N2(1)

interface port-channel101
  description Garden Level North
  switchport mode trunk
  vpc 101
  logging event port link-status
  logging event port trunk-status
  speed 10000

HMMB5K-1# sh vpc 101

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
101    Po101       up     success     success                    1-13,18,20-
                                                                 21,24-32,35
                                                                 -37,42,45,5
                                                                 0,54,60,70,
                                                                 80,91,9....

HMMB5K-2# sh run int po101

!Command: show running-config interface port-channel101
!Time: Thu Mar 13 19:03:00 2014

version 5.0(2)N2(1)

interface port-channel101
  description Garden Level North
  switchport mode trunk
  vpc 101
  logging event port link-status
  logging event port trunk-status
  speed 10000

HMMB5K-2# sh vpc 101

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
101    Po101       down*  success     success                    -

HP# sh trunk

 Load Balancing Method: L3-based (Default), L2-based if non-IP traffic

  Port   | Name                             Type      | Group  Type
  ------ + -------------------------------- --------- + ------ --------
  1/49   | HMMB5K-1.1-1                     SFP+SR    | Trk1   LACP
  3/49   | HMMB5K-2.1-1                     SFP+SR    | Trk1   LACP

HP# sh int br | i Trk

                         | Intrusion                           MDI  Flow Bcast
  Port         Type      | Alert     Enabled Status Mode       Mode Ctrl Limit
  ------------ --------- + --------- ------- ------ ---------- ---- ---- -----
  1/49-Trk1    SFP+SR    | No        Yes     Up     10GigFD    NA   off  0
  3/49-Trk1    SFP+SR    | No        Yes     Down   10GigFD         off  0
 

Let me know if any other show commands would help.

[Jon Marshall]

Can you from the Nexus with the port channel that is down -

1) specify which ports make up the port channel

2) post a "sh vpc" from that switch

Jon

[Russell Gibbons]

interface Ethernet1/1
  description Garden Level North
  switchport mode trunk
  channel-group 101 mode active

interface port-channel101
  description Garden Level North
  switchport mode trunk
  vpc 101
  logging event port link-status
  logging event port trunk-status
  speed 10000
 

HMMB5K-2# sh vpc
Legend:
                (*) - local vPC is down, forwarding via vPC peer-link

vPC domain id                   : 1
Peer status                     : peer adjacency formed ok
vPC keep-alive status           : peer is alive
Configuration consistency status: success
Per-vlan consistency status     : success
Type-2 consistency status       : success
vPC role                        : secondary
Number of vPCs configured       : 4
Peer Gateway                    : Disabled
Dual-active excluded VLANs      : -
Graceful Consistency Check      : Enabled

vPC Peer-link status
---------------------------------------------------------------------
id   Port   Status Active vlans
--   ----   ------ --------------------------------------------------
1    Po10   up     1-13,18,20-21,24-32,35-37,42,45,50,54,60,70,80,91,
                   98,111-116,121-125,131-132,141,181-183,189,191,195
                   ,201,206-216,221-225,241-242,251,270,277,300,320-3
                   21,401-403,405,420-422,424-427,499-503,510-513,554
                   ,570-571,575,700-702,704,920

vPC status
----------------------------------------------------------------------------
id     Port        Status Consistency Reason                     Active vlans
------ ----------- ------ ----------- -------------------------- -----------
100    Po100       up     success     success                    1-13,18,20-
                                                                 21,24-32,35
                                                                 -37,42,45,5
                                                                 0,54,60,70,
                                                                 80,91,9....
101    Po101       down*  success     success                    -
102    Po102       down*  success     success                    -
186    Po186       down*  success     success                    -

Thanks,

Russell

[Jon Marshall]

Russell

Sorry, i thought the "sh vpc" would also show the member ports not just the port channel interface.

Can you post -

"sh vpc consistency-parameters interface ethernet 1/1"

Jon

[Russell Gibbons]

fails on physical interface, but here it is on the port-channel:

HMMB5K-2# sh vpc consistency-parameters int po101

    Legend:
        Type 1 : vPC will be suspended in case of mismatch

Name                        Type  Local Value            Peer Value
-------------               ----  ---------------------- -----------------------
Shut Lan                    1     No                     No
STP Port Type               1     Default                Default
STP Port Guard              1     None                   None
STP MST Simulate PVST       1     Default                Default
lag-id                      1     -                      [(188b,
                                                         38-ea-a7-71-18-8b,
                                                         232, 0, 0), (7f9b,
                                                         0-23-4-ee-be-1, 8065,
                                                         0, 0)]
mode                        1     -                      active
Speed                       1     -                      10 Gb/s
Duplex                      1     -                      full
Port Mode                   1     -                      trunk
Native Vlan                 1     -                      1
MTU                         1     -                      1500
Allowed VLANs               -     1-3967,4048-4093       1-3967,4048-4093
Local suspended VLANs       -     -                      -
HMMB5K-2# sh vpc consistency-parameters int e1/1
ERROR: Unsupported interface type for VPC  consistency parameter info

HMMB5K-1#  sh vpc consistency-parameters int po101

    Legend:
        Type 1 : vPC will be suspended in case of mismatch

Name                        Type  Local Value            Peer Value
-------------               ----  ---------------------- -----------------------
Shut Lan                    1     No                     No
STP Port Type               1     Default                Default
STP Port Guard              1     None                   None
STP MST Simulate PVST       1     Default                Default
lag-id                      1     [(188b,                -
                                  38-ea-a7-71-18-8b,
                                  232, 0, 0), (7f9b,
                                  0-23-4-ee-be-1, 8065,
                                  0, 0)]
mode                        1     active                 -
Speed                       1     10 Gb/s                -
Duplex                      1     full                   -
Port Mode                   1     trunk                  -
Native Vlan                 1     1                      -
MTU                         1     1500                   -
Allowed VLANs               -     1-3967,4048-4093       1-3967,4048-4093
Local suspended VLANs       -     -                      -
HMMB5K-1#  sh vpc consistency-parameters int e1/1
ERROR: Unsupported interface type for VPC  consistency parameter info

Thanks,

Russell

[Jon Marshall]

Russell

I suspect the issue may be a consistency check failure at the interface level (although i could be wrong).

The port channel shows as successful for the consistency checks but that doesn't necessarily mean the physical interface passed.

The last command i asked for should have shown the consistency check status for the physical interface but it is saying it is unsupported.

So what is the equivalent physical interface on the working switch and can you run the command on that one.

Is the physical interface on the working switch from the same linecard type ?

Jon

[Russell Gibbons]

On both 5K-1 and 5K-2, the physical interface is E1/1, which is in port-channel 101, which is in vPC 101. The show commands of the PC and the physical interface for both nexus switches is in my previous post - 

working:

HMMB5K-1#  sh vpc consistency-parameters int e1/1
ERROR: Unsupported interface type for VPC  consistency parameter info

not working:

HMMB5K-2# sh vpc consistency-parameters int e1/1
ERROR: Unsupported interface type for VPC  consistency parameter info

[Jon Marshall]

Yes you did post both switches, my mistake.

What linecards are the physical ports on ?

Jon

[glen.grant]

Check the logs on the side that did not come up ,usually it will tell you why it did not bring the second side up .  Post a show vpc consistency-parameters .   On the 3800 stack are your uplinks all bound into the same port channel ??

[Steve Fuller]

Hi Russell,

Can you post the output of show port-channel summary, show lacp neigh int port-ch 101, show lacp counter int port 101 and show int eth1/1?

Also do you have UDLD configured on the Nexus switches? I've seen UDLD cause issues when connecting to HP switches as the UDLD frames are simply passed through the HP switch. Perhaps also include a show udld neigh if UDLD is enabled.

Regards

[shamg1974]

Hi Russell,

Did you ever get a resolution to this problem? I have the exact same issue...

[shamg1974]

Any resolution to this issue?