08-11-2010 05:02 AM - edited 03-06-2019 12:25 PM
Hello, we are trying to configure a pair of Nexus 5K's and setup vpc peer link between them. When I issue the show vpc brief command, the peer-keepalive link is working fine, but the vpc peer relationship isn't coming active. I'm following the Cisco N5K config guide and have both sides of the 5K's config'd the same (except for the peer keepalive IP addresses) but can't seem to bring the vpc peer link active. Are there any vpc setup guides that anybody has found helpful? Thanks in advance for any suggestions, John
Solved! Go to Solution.
08-11-2010 10:17 AM
i think that vlan 1 should be allowed on trunk on both portchannels , not sure if it must be native.
Also the ip put for keep alive on interface mgmt0.
08-11-2010 05:29 AM
Hi ,
could you post the output of
sh run vpc
also
sh vpc consistency-parameters global
Dan
08-11-2010 06:19 AM
Hello Dan....here is the output requested:
version 4.1(3)N2(1a)
feature vpc
vpc domain 100
peer-keepalive destination 172.29.217.1 source 172.29.217.2
interface port-channel5
vpc peer-link
Legend:
Type 1 : vPC will be suspended in case of mismatch
Name Type Local Value Peer Value
------------- ---- ---------------------- -----------------------
QoS 1 ([], [3], [], [], [], -
[])
Network QoS (MTU) 1 (1538, 2240, 0, 0, 0, -
0)
Network Qos (Pause) 1 (F, T, F, F, F, F) -
Input Queuing (Bandwidth) 1 (50, 50, 0, 0, 0, 0) -
Input Queuing (Absolute 1 (F, F, F, F, F, F) -
Priority)
Output Queuing (Bandwidth) 1 (50, 50, 0, 0, 0, 0) -
Output Queuing (Absolute 1 (F, F, F, F, F, F) -
Priority)
STP Mode 1 Rapid-PVST -
STP Disabled 1 None -
STP MST Region Name 1 "" -
STP MST Region Revision 1 0 -
STP MST Region Instance to 1 -
VLAN Mapping
STP Loopguard 1 Disabled -
STP Bridge Assurance 1 Enabled -
STP Port Type, Edge 1 Normal, Disabled, -
BPDUFilter, Edge BPDUGuard Disabled
STP MST Simulate PVST 1 Enabled -
Allowed VLANs - - -
08-11-2010 07:16 AM
Hello ,
Could you check that the Portchannel interface is up on both sides and the both portchannels are mode trunk , all the vlans allowed on trunk , and also feature lacp enabled
If it is ok for you to post also sh port-channel summary.
08-11-2010 07:37 AM
Thanks again for your help Dan...
SOCC-N5Kb# sh port-channel summary
Flags: D - Down P - Up in port-channel (members)
I - Individual H - Hot-standby (LACP only)
s - Suspended r - Module-removed
S - Switched R - Routed
U - Up (port-channel)
--------------------------------------------------------------------------------
Group Port- Type Protocol Member Ports
Channel
--------------------------------------------------------------------------------
1 Po1(SD) Eth NONE --
4 Po4(SU) Eth NONE Eth1/19(P) Eth2/1(D)
5 Po5(SU) Eth NONE Eth1/3(P) Eth1/4(P)
21 Po21(SD) Eth NONE --
100 Po100(SD) Eth NONE --
interface port-channel5
switchport mode trunk
switchport trunk native vlan 20
switchport trunk allowed vlan 10-20
vpc peer-link
spanning-tree port type network
speed 10000
SOCC-N5Ka# sh port-channel summary
Flags: D - Down P - Up in port-channel (members)
I - Individual H - Hot-standby (LACP only)
s - Suspended r - Module-removed
S - Switched R - Routed
U - Up (port-channel)
--------------------------------------------------------------------------------
Group Port- Type Protocol Member Ports
Channel
--------------------------------------------------------------------------------
1 Po1(SD) Eth NONE Eth2/2(D)
2 Po2(SD) Eth NONE --
3 Po3(SD) Eth NONE --
4 Po4(SD) Eth NONE Eth2/3(D) Eth2/4(D)
5 Po5(SU) Eth NONE Eth1/3(P) Eth1/4(P)
21 Po21(SD) Eth NONE --
nterface port-channel5
switchport mode trunk
switchport trunk native vlan 20
switchport trunk allowed vlan 10-20
vpc peer-link
spanning-tree port type network
08-11-2010 07:58 AM
Hi,
On Nk5kb can you remove "speed 10000" and see if that resolves the issue, if not post the output of show vpc from both switches.
JayaKrishna
08-11-2010 10:17 AM
i think that vlan 1 should be allowed on trunk on both portchannels , not sure if it must be native.
Also the ip put for keep alive on interface mgmt0.
09-30-2010 03:05 PM
That solved my issue. I did not realize that the trunk mode had to be turned on with a VLAN enabled. After doing so, my peer link came right up. Thanks!!!
M
08-11-2010 11:27 AM
I'm currently working with John on this Nexus 5K config & I have updated the config on both device ensuring the speed 10000 match on each. Listed below are the results from the sho vpc consistency-parameters global
Name Type Local Value Peer Value
------------- ---- ---------------------- -----------------------
QoS 1 ([], [3], [], [], [], ([], [3], [], [], [],
[]) [])
Network QoS (MTU) 1 (1538, 2240, 0, 0, 0, (1538, 2240, 0, 0, 0,
0) 0)
Network Qos (Pause) 1 (F, T, F, F, F, F) (F, T, F, F, F, F)
Input Queuing (Bandwidth) 1 (50, 50, 0, 0, 0, 0) (50, 50, 0, 0, 0, 0)
Input Queuing (Absolute 1 (F, F, F, F, F, F) (F, F, F, F, F, F)
Priority)
Output Queuing (Bandwidth) 1 (50, 50, 0, 0, 0, 0) (50, 50, 0, 0, 0, 0)
Output Queuing (Absolute 1 (F, F, F, F, F, F) (F, F, F, F, F, F)
Priority)
STP Mode 1 Rapid-PVST Rapid-PVST
STP Disabled 1 None None
STP MST Region Name 1 "" ""
STP MST Region Revision 1 0 0
STP MST Region Instance to 1
VLAN Mapping
STP Loopguard 1 Disabled Disabled
STP Bridge Assurance 1 Enabled Enabled
STP Port Type, Edge 1 Normal, Disabled, Normal, Disabled,
BPDUFilter, Edge BPDUGuard Disabled Disabled
STP MST Simulate PVST 1 Enabled Enabled
Allowed VLANs - 1 -
In additon, I can see the second device within the neighbor statements
08-11-2010 12:53 PM
Hi,
Everything looks good there, can you still post "show vpc" from both switches.
JayaKrishna
08-11-2010 12:59 PM
it working..
sh vpc
Legend:
(*) - local vPC is down, forwarding via vPC peer-link
vPC domain id : 100
Peer status : peer adjacency formed ok
vPC keep-alive status : peer is alive
Configuration consistency status: success
vPC role : primary
It appear that once I added VLAN 1 into the trunk leaving the speed @ 10000 everything appeared to respond..
08-11-2010 01:22 PM
Adding VLAN1 was the missing element! Thank you Dan and Jaya for your knowledge and input!!!
08-11-2010 11:14 PM
Hi,
Not sure if adding vlan did the trick there, I tested this in the lab and it works for me even if without vlan on the trunk but I am testing this on Nexus 7k but should be same on 5k as well. You can test it as well by removing vlan 1 again and see if it breaks.
vPC Peer-link status
---------------------------------------------------------------------
id Port Status Active vlans
-- ---- ------ --------------------------------------------------
1 Po4001 up 9,201,296,900,1016,1670-1674,1710-1714,1730-1739,1
760-1814,1820-1824,1830-1859,1870-1874,2105-2109,2
672,2737,2771,2776,2782,2787,2792,2797,2802,2807,2
812,2822,2831-2833,2837,2842,2847,2852,2858-2859,2
Nexus7K-Isle2-2# sh run int po4001
!Command: show running-config interface port-channel4001
!Time: Thu Aug 12 06:11:29 2010
version 4.2(4)
interface port-channel4001
switchport
switchport mode trunk
switchport trunk native vlan 4093
switchport trunk allowed vlan 2-3967,4048-4093
vpc peer-link
spanning-tree port type network
mtu 9216
JayaKrishna
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