cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
1316
Views
15
Helpful
3
Replies

Problem with VPC between C9500 and N5K

mfilser
Level 1
Level 1

Hi all.

I have a problem between Nexus 5K and Catalyst 9500 (C9500-48Y4C / Stack Wise Virtual).
The VPC is reporting an error (vpc port channel mis-config due to vpc links in the 2 switches connected to different partners)
The N5K's were connected to a C6509-VSS-system and I've replaced it by C9500-Stack-Wise-Virtual.
Connected to the C6509, the VPC was working fine. But now I have an error.
It seems, the C9500 is reporting two different mac-adresses to the N5K's.

I've controlled the configuration, but I can't find any misconfiguration.
On N5K the configuration was not changed. On C9500 booth links are configured identical and bundeled into a port-channel.
Mode is configured as activ.

The solution about this issue I found in the Internet, is to shut/no shut the port-channel on C9500-site. But this is not an option,
because I can't interrupt the traffic to the server-farm behind the N5K's (live operation).

Is there a possibility to bring up the VPC without interrupting the connection?

I would be able to establish a second VPC between the Systems, but I'm not really familiar with Nexus. So I would need a "How-To" to configure it and step-by-step for a non-interrupting-operation.

If you need additional information, please let me know.


Hope, someone can help

 

Best regards

Markus

 

 

Here you will find some informations:


C9500# ==> Cisco IOS XE Software, Version 16.12.04
==> Model Number: C9500-48Y4C

C9500# sh run int po126

interface Port-channel126
description Uplink_DAC
switchport mode trunk

sh run int twe 1/0/43 (identical to 2/0/43)

interface TwentyFiveGigE1/0/43
description Uplink_DAC
switchport mode trunk
channel-group 126 mode active


#######################################

 

C9500# sh lacp 126 neigh

sh lacp 126 neigh
Flags: S - Device is requesting Slow LACPDUs
F - Device is requesting Fast LACPDUs
A - Device is in Active mode P - Device is in Passive mode

Channel group 126 neighbors

LACP port Admin Oper Port Port
Port Flags Priority Dev ID Age key Key Number State
Twe1/0/43 SA 32768 0023.04ee.be65 28s 0x0 0x802B 0x12B 0x3D
Twe2/0/43 SP 0 0000.0000.0000 856328s 0x0 0x0 0x0 0x0


###########################################

 

 

###########################################
Nexus 5K 01 and Nexus 5K 02
###########################################

Software
BIOS: version 2.1.7
Power Sequencer Firmware:
Module 1: v4.0
Module 1: v4.0
Fabric Power Sequencer Firmware: Module 1: version v4.0
Microcontroller Firmware: version v0.0.0.15
QSFP Microcontroller Firmware:
Module 1: v2.0.0.0
SFP Microcontroller Firmware:
Module 1: v1.3.0.0
CXP Microcontroller Firmware:
Module not detected
kickstart: version 7.3(5)N1(1)
system: version 7.3(5)N1(1)
BIOS compile time: 06/16/2016
kickstart image file is: bootflash:///n6000-uk9-kickstart.7.3.5.N1.1.bin
kickstart compile time: 2/11/2019 2:00:00 [02/11/2019 16:36:57]
system image file is: bootflash:///n6000-uk9.7.3.5.N1.1.bin
system compile time: 2/11/2019 2:00:00 [02/11/2019 16:38:54]


Hardware
cisco Nexus 5672UP Chassis ("Nexus 5672UP Supervisor")
Intel(R) Xeon(R) CPU @ 1.80 with 8243276 kB of memory.
Processor Board ID FOC22362EVZ

Device name: xxxxxxxx
bootflash: 7208960 kB

Kernel uptime is 700 day(s), 22 hour(s), 47 minute(s), 22 second(s)

Last reset at 336703 usecs after Mon Jun 10 09:26:28 2019

Reason: Disruptive upgrade
System version: 7.3(3)N1(1)
Service:

plugin
Core Plugin, Ethernet Plugin

Active Package(s)


############################################################################

 

N5K_01# sh vpc brief
Legend:
(*) - local vPC is down, forwarding via vPC peer-link

vPC domain id : 101
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 : primary
Number of vPCs configured : 15
Peer Gateway : Enabled
Peer gateway excluded VLANs : -
Dual-active excluded VLANs : -
Graceful Consistency Check : Enabled
Operational Layer3 Peer-router : Enabled
Auto-recovery status : Enabled (timeout = 240 seconds)

vPC Peer-link status
---------------------------------------------------------------------
id Port Status Active vlans
-- ---- ------ --------------------------------------------------
1 Po100 up 1-2,10,35,85,100,108,136,151,156,177-178,200,2061-
2062,3000,3004,3008,3099

vPC status
----------------------------------------------------------------------------
id Port Status Consistency Reason Active vlans
------ ----------- ------ ----------- -------------------------- -----------
1 Po1 up success success 1-2,10,35,8
5,100,108,1
51,177-178,
200,2061-20
62
3 Po3 up success success 1-2,10,35,8
5,100,108,1
51,177-178,
200,2061-20
62
43 Po43 up success success 1-2,10,35,8
5,100,108,1
36,151,156,
177-178,200
,2061-20....

.
.
.

################################################################################################################

 


N5K_02# sh vpc brief
Legend:
(*) - local vPC is down, forwarding via vPC peer-link

vPC domain id : 101
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 : 15
Peer Gateway : Enabled
Peer gateway excluded VLANs : -
Dual-active excluded VLANs : -
Graceful Consistency Check : Enabled
Operational Layer3 Peer-router : Enabled
Auto-recovery status : Enabled (timeout = 240 seconds)

vPC Peer-link status
---------------------------------------------------------------------
id Port Status Active vlans
-- ---- ------ --------------------------------------------------
1 Po100 up 1-2,10,35,85,100,108,136,151,156,177-178,200,2061-
2062,3000,3004,3008,3099

vPC status
----------------------------------------------------------------------------
id Port Status Consistency Reason Active vlans
------ ----------- ------ ----------- -------------------------- -----------
1 Po1 up success success 1-2,10,35,8
5,100,108,1
51,177-178,
200,2061-20
62
3 Po3 up success success 1-2,10,35,8
5,100,108,1
51,177-178,
200,2061-20
62
43 Po43 down* failed vpc port channel -
mis-config due to vpc
links in the 2 switches
connected to different
partners

.
.
.


################################################################################################################

 

N5K_01 and N5K_02

sh run int po43
interface port-channel43
description Uplink_Core
switchport mode trunk
switchport trunk allowed vlan 1-2,10,35,85,100,108,136,151,156,177-178,200,2061-2062,3000,30
04,3099
speed 10000
vpc 43


sh run int Eth1/43
interface Ethernet1/43
description Uplink_Core
switchport mode trunk
switchport trunk allowed vlan 1-2,10,35,85,100,108,136,151,156,177-178,200,2061-2062,3000,30
04,3099
channel-group 43 mode active


N5K_01# sh lacp port-channel
port-channel43
System Mac=0-3a-9c-26-47-c1
Local System Identifier=0x8000,0-3a-9c-26-47-c1
Admin key=0x802b
Operational key=0x802b
Partner System Identifier=0x8000,cc-7f-76-43-c0-c0
Operational key=0x7e
Max delay=0
Aggregate or individual=0
Member Port List=43

N5K_02# sh lacp port-channel ==> no information about lacp (because link Eth1/43 is suspended by vpc)

 

 

 

 

3 Replies 3

marce1000
VIP
VIP

 

 Ref : https://community.cisco.com/t5/server-networking/has-anybody-seen-this-vpc-error-on-the-5k/td-p/1417364

                      Check if the Resolving-reply of this thread can be applied to your case.

 M.



-- ' 'Good body every evening' ' this sentence was once spotted on a logo at the entrance of a Weight Watchers Club !

Hi.

Thx for the answer.

But it's not an option, because it will interrupt the traffic. And I'm searching for a solution without any cut ....

 

Best regards

 

Markus

 

 - Afraid it looks quite  indicative it may be required, for business-continuity launch case with TAC and state your business-needs on this matter.

 M.



-- ' 'Good body every evening' ' this sentence was once spotted on a logo at the entrance of a Weight Watchers Club !
Getting Started

Find answers to your questions by entering keywords or phrases in the Search bar above. New here? Use these resources to familiarize yourself with the community: