Replace a Supervisor Module for Catalyst 6500 VSS 1440

[navin-kumar-nadarajah-ext]

Hi,

This VSS system in Question is Quad Sup. 

1. As active Sup have issue, a failover has to be conducted before replacement . What to expect after failover in Quad SUP VSS set up will there be any minor / transient traffic impact for Switch 1 . Detailed impact  and verification plan have to be included post failover is completed to ensure Switch 2 has taken all services successfully.

1. After switchover the current Sup having issue will be reseating automatically . If the errors are gone and ports comes up and errors are gone , activity stops here and monitor

1. If the SUP fails to reboot error free in Step 2 , then replacement will proceed . Please advise if the same steps need to be followed for Quad Sup Scenario .

Thank you.

[balaji.bandi]

check the below post :

https://community.cisco.com/t5/switching/replace-supervisor-module-in-cisco-catalyst-6500-vss-1440/m-p/2506557

[Leo Laohoo]

---

@navin-kumar-nadarajah-ext wrote:
As active Sup have issue, a failover has to be conducted before replacement . What to expect after failover in Quad SUP VSS set up will there be any minor / transient traffic impact for Switch 1 . Detailed impact  and verification plan have to be included post failover is completed to ensure Switch 2 has taken all services successfully.

---

This questions sounds like Change Control Board (CCB) is asking questions directed at the network team but the network team is not familiar with the system.  

It is totally irresponsible for anyone to answer this question because nobody outside of this network knows anything about the network.  

Get Cisco TAC or get a reputable system integrator.  

---

@navin-kumar-nadarajah-ext wrote:

1. After switchover the current Sup having issue will be reseating automatically . If the errors are gone and ports comes up and errors are gone , activity stops here and monitor

1. If the SUP fails to reboot error free in Step 2 , then replacement will proceed . Please advise if the same steps need to be followed for Quad Sup Scenario .

---

What error?

What Step 2?  Where is Step 1? 

Yeah, nah Mate.  I'm going down hard on this thread because a quad Sup is no laughing matter.  If the person cannot even cut-n-paste properly and correctly, what are the chances that useful information will be forthcoming?  

[navin-kumar-nadarajah-ext]

Hi, 

First of all apologies for the error message and below are the brief explanation on this issue:

current situation - system running on quad SUP VSS . Primary Active SUP primary of Primary chassis is having error as below:

Impact :  2 VSL link out of 4 were flapping very badly and we have shut them down

  LMP summary

    Link info:        Configured: 4        Operational: 2

                            Peer Peer          Peer   Peer      Timer(s)running

Interface Flag State        Flag MAC           Switch Interface (Time remaining)

--------------------------------------------------------------------------------

Te1/6/4   v    link_down    -    -               -     -         

Te1/6/5   v    probe_wait   -    -               -     -          T1(4ms) 

                                                                 T2(5.00s)

Te1/5/4   vfsp operational  vfsp 0024.c4dc.3a80 2      Te2/5/4   T4(492ms)

                                                                 T5(59.96s)

Te1/5/5   vfsp operational  vfsp 0024.c4dc.3a80 2      Te2/6/5   T4(492ms)

                                                                 T5(59.96s)

Flags:  v - Valid flag set        f - Bi-directional flag set

         s - Negotiation flag set  p - Peer detected flag set

Timers: T4 - Hello Tx Timer   T5 - Hello Rx Timer

Switch Number:     1   Role:   Virtual Switch Active

----------------------  -----------------------------

Mod Ports Card Type                              Model              Serial No.

--- ----- -------------------------------------- ------------------ -----------

  1   16  CEF720 16 port 10GE                    WS-X6716-10GE      SAL1749HL07

  2   16  CEF720 16 port 10GE                    WS-X6716-10GE      SAL1749HKYC

  5    5  Supervisor Engine 720 10GE (RPR-Warm)  VS-S720-10G        SAL1752JHFB

  6    5  Supervisor Engine 720 10GE (Active)    VS-S720-10G        SAL1804LAQ3

  7   48  CEF720 48 port 1000mb SFP              WS-X6748-SFP       SAL1751HZSC

  8   48  CEF720 48 port 1000mb SFP              WS-X6748-SFP       SAL1801JRNH

  9   48  CEF720 48 port 10/100/1000mb Ethernet  WS-X6748-GE-TX     SAL1338Z0XT

Mod MAC addresses                       Hw    Fw           Sw           Status

--- ---------------------------------- ------ ------------ ------------ -------

  1  e4d3.f1a4.5568 to e4d3.f1a4.5577   2.1   12.2(18r)S1  12.2(33)SXJ7 Ok

  2  e4d3.f1a4.55b8 to e4d3.f1a4.55c7   2.1   12.2(18r)S1  12.2(33)SXJ7 Ok

  5  4403.a70a.8ba3 to 4403.a70a.8baa   4.1   8.5(4)       12.2(33)SXJ7 Ok

  6  a44c.1177.ffd7 to a44c.1177.ffde   4.1   8.5(4)       12.2(33)SXJ7 Ok

  7  e4c7.22b3.6654 to e4c7.22b3.6683   3.0   12.2(18r)S1  12.2(33)SXJ7 Ok

  8  e4d3.f193.4fd4 to e4d3.f193.5003   3.0   12.2(18r)S1  12.2(33)SXJ7 Ok

  9  0026.cbbb.1a10 to 0026.cbbb.1a3f   3.2   12.2(18r)S1  12.2(33)SXJ7 Ok

Mod  Sub-Module                  Model              Serial       Hw     Status

---- --------------------------- ------------------ ----------- ------- -------

  1  Distributed Forwarding Card WS-F6700-DFC3CXL   SAL1747GNMH  1.8    Ok

  2  Distributed Forwarding Card WS-F6700-DFC3CXL   SAL1747GNMR  1.8    Ok

  5  Policy Feature Card 3       VS-F6K-PFC3CXL     SAL1752JG7T  1.3    Ok

  6  Policy Feature Card 3       VS-F6K-PFC3CXL     SAL1811NNN2  1.3    Ok

  6  MSFC3 Daughterboard         VS-F6K-MSFC3       SAL1806LW08  5.2    Ok

  7  Centralized Forwarding Card WS-F6700-CFC       SAL1752JBYW  4.1    Ok

  8  Centralized Forwarding Card WS-F6700-CFC       SAL1804L7G7  4.2    Ok

  9  Distributed Forwarding Card WS-F6700-DFC3CXL   SAL1337YEBT  1.6    Ok

Mod  Online Diag Status

---- -------------------

  1  Pass

  2  Pass

  5  Pass

  6  Minor Error

  7  Pass

  8  Pass

  9  Pass

1. As active SUP has issue, failover has to be conducted before replacement. What to expect after failover in Quad SUP VSS set up will there be any minor / transient traffic impact for Switch 1.

2. After switchover the current Sup having issue will be reseating automatically . If the errors are gone and ports comes up and errors are gone , activity stops here and will be monitor

3. If the SUP fails to reboot error free in Step 2 , then replacement will proceed .

Kindly advise if the same steps as Dual SUP VSS for Quad SUP VSS.

Thank you.

[YTL-Shirshendu]

We have a Quad SUP VSS and we are seeing sudden Minor error in the Active SUP of Switch 1 . We would like to replace the Swich 1 SUP slot 6  . the TenG interfaces which are part of VSL on SUP slot 6 are not coming UP after the minor error appeared  and after that Swich 1 slot 5 SUP TenG ports are acting as VSL links . currently we have shut the TenGig  ports of Switch 1 Sup slot6 as its was flapping every secs . So due to this the Active SUP currently have no ports connected to VSL

What will be the best way to replace the Active Sup without any traffic interruption

Please advise what step should be take to for 0 traffic impact during replacement of Active SUP

If we have to swchover what will be the roles of the SUP in both switch after switchover is performed

Will there be any traffic impact during switchover .

Which chassis and  SUP will be elected as Active and Standby HOT after switchover

Please suggest the steps and initial config that need to be done on the new supervisor for slot 6  if we want to replace the SUP. Or its enough to match the IOS only and insert the SUP and the rest everything will be done automatically

Switch Number: 1 Role: Virtual Switch Active

---------------------- -----------------------------

Mod Ports Card Type Model Serial No.

--- ----- -------------------------------------- ------------------ -----------

5 5 Supervisor Engine 720 10GE (RPR-Warm) VS-S720-10G SAL1752JHFB

6 5 Supervisor Engine 720 10GE (Active) VS-S720-10G SAL1804LAQ3

Mod Online Diag Status

---- -------------------

5 Pass
6 Minor Error

Switch Number: 2 Role: Virtual Switch Standby

---------------------- -----------------------------

Mod Ports Card Type Model Serial No.

--- ----- -------------------------------------- ------------------ -----------

5 5 Supervisor Engine 720 10GE (Hot) VS-S720-10G SAL1750HSMK

6 5 Supervisor Engine 720 10GE (RPR-Warm) VS-S720-10G SAL1750HQ7P

Mod Online Diag Status

---- -------------------

5 Pass

6 Pass

[Mark Elsen]

  - @YTL-Shirshendu        Minor Errors can be caused by temperature issues ;what does show environment alarm output ?
                                        Also, look for "F" (Failed) test results in                                      show diagnostic result module 6

  M.

[YTL-Shirshendu]

_Hi Mark For You info. 

168069: Mar 12 12:46:46.022 MYT: %VSL-SW1_SP-5-VSL_CNTRL_LINK: New VSL Control Link Te1/5/4
168068: Mar 12 12:46:46.022 MYT: %VSLP-SW1_SP-3-VSLP_LMP_FAIL_REASON: Te1/6/4: Timeout (60000msec) waiting for Hello packet from peer
168067: Mar 12 12:46:46.010 MYT: %VSL-SW1_SP-5-VSL_CNTRL_LINK: New VSL Control Link Te1/6/4
168066: Mar 12 12:46:46.010 MYT: %VSLP-SW1_SP-3-VSLP_LMP_FAIL_REASON: Te1/6/5: Timeout (60000msec) waiting for Hello packet from peer
168065: Mar 12 12:46:45.114 MYT: %CPU_MONITOR-SW1_SP-6-NOT_HEARD: CPU_MONITOR messages have not been heard for 60 seconds [39/0]
168064: Mar 12 12:46:46.202 MYT: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/6/5, changed state to down
168063: Mar 12 12:46:46.198 MYT: %LINK-3-UPDOWN: Interface TenGigabitEthernet1/6/4, changed state to down
168062: Mar 12 12:46:46.190 MYT: %LINK-3-UPDOWN: Interface TenGigabitEthernet2/5/5, changed state to down
168061: Mar 12 12:46:46.186 MYT: %LINK-3-UPDOWN: Interface TenGigabitEthernet2/6/4, changed state to down
168060: Mar 12 12:46:46.070 MYT: %VSL-SW2_SPSTBY-5-VSL_CNTRL_LINK: New VSL Control Link Te2/5/4
168059: Mar 12 12:46:46.070 MYT: %VSLP-SW2_SPSTBY-3-VSLP_LMP_FAIL_REASON: Te2/5/5: Link down
168058: Mar 12 12:46:46.062 MYT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet2/6/4, changed state to down
168057: Mar 12 12:46:46.062 MYT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/6/4, changed state to down
168056: Mar 12 12:46:46.058 MYT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet2/5/5, changed state to down
168055: Mar 12 12:46:46.014 MYT: %LINEPROTO-5-UPDOWN: Line protocol on Interface TenGigabitEthernet1/6/5, changed state to down
168053: Mar 12 12:46:17.066 MYT: %CPU_MONITOR-SW1_SP-6-NOT_HEARD: CPU_MONITOR messages have not been heard for 31 seconds [40/0]
168052: Mar 12 12:46:15.066 MYT: %CPU_MONITOR-SW1_SP-6-NOT_HEARD: CPU_MONITOR messages have not been heard for 30 seconds [39/0]

__________________________________________________________________________

46) TestVslStatus:

Port 1 2 3 4 5
-------------------
U U U F F

Error code ------------------> 1 (DIAG_FAILURE)
Total run count -------------> 1429
Last test testing type ------> Health Monitoring
Last test execution time ----> Mar 12 2026 15:20:51
First test failure time -----> Mar 12 2026 12:46:46
Last test failure time ------> Mar 12 2026 15:20:51
Last test pass time ---------> Dec 15 2024 13:29:54
Total failure count ---------> 1424
Consecutive failure count ---> 1424
___________________________________________________________________________

Cisco IOS Software, s72033_rp Software (s72033_rp-ADVENTERPRISEK9_WAN-M), Version 12.2(33)SXJ7, RELEASE SOFTWARE (fc5)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2014 by Cisco Systems, Inc.
Compiled Sun 09-Feb-14 10:55 by prod_rel_team

ROM: System Bootstrap, Version 12.2(17r)SX7, RELEASE SOFTWARE (fc1)

[Mark Elsen]

     - @YTL-Shirshendu       I would advice to check the software version on the switches and upgrade to the latest
                                          advisory release ; especially if currently an older version is being used

  M.

[YTL-Shirshendu]

To upgrade also answers to these is required . As the first the SUP need to be replaced . after that we will consider upgrade is required 

What will be the best way to replace the Active Sup without any traffic interruption

Please advise what step should be take to for 0 traffic impact during replacement of Active SUP

If we have to swichover 

Will there be any traffic impact during switchover .

Will the chassis one will reboot completely after swichover with all Line cards

Please suggest the steps and initial config (if any)  that need to be done for replacement supervisor  for Swich 1 slot 6   if we want to replace the SUP.

Is it enough to match the IOS only and insert the SUP and the rest everything will be done automatically or have to do any initial steps

[YTL-Shirshendu]

We have a Quad SUP VSS and we are seeing sudden Minor error in the Active SUP of Switch 1 . We would like to replace the Swich 1 SUP slot 6 (Current-Active )  . The TenG interfaces which are part of VSL on SUP slot 6 are not coming UP after the minor error appeared  and after that Swich 1 slot 5 SUP TenG ports are acting as Active VSL links . Currently we have shut the TenGig  ports of Switch 1 Sup slot6 as its was flapping every secs .

What will be the best way to replace the Active Sup without any traffic interruption

Please advise what step should be take to for 0 traffic impact during replacement of Active SUP

If we have to swichover 

Will there be any traffic impact during switchover .

Will the chassis one will reboot completely after swichover with all Line cards

Please suggest the steps and initial config (if any)  that need to be done for replacement supervisor  for Swich 1 slot 6   if we want to replace the SUP.

Is it enough to match the IOS only and insert the SUP and the rest everything will be done automatically or have to do any initial steps

Switch Number: 1 Role: Virtual Switch Active

---------------------- -----------------------------

Mod Ports Card Type Model Serial No.

--- ----- -------------------------------------- ------------------ -----------

5 5 Supervisor Engine 720 10GE (RPR-Warm) VS-S720-10G SAL1752JHFB

6 5 Supervisor Engine 720 10GE (Active) VS-S720-10G SAL1804LAQ3

Mod Online Diag Status

---- -------------------

5 Pass
6 Minor Error

Switch Number: 2 Role: Virtual Switch Standby

---------------------- -----------------------------

Mod Ports Card Type Model Serial No.

--- ----- -------------------------------------- ------------------ -----------

5 5 Supervisor Engine 720 10GE (Hot) VS-S720-10G SAL1750HSMK

6 5 Supervisor Engine 720 10GE (RPR-Warm) VS-S720-10G SAL1750HQ7P

Mod Online Diag Status

---- -------------------

5 Pass

6 Pass