ERS5698 - Added new MLT and VLANS were removed from other MLTs

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  • kmanue
    Member
    • May 2011
    • 3
    #1

    ERS5698 - Added new MLT and VLANS were removed from other MLTs

    I experienced an odd issue (that caused an outage) that I will try to explain and summarize as best as possible. If anybody has ever heard of anything like this or notices where I might have erred, please let me know so I that can ensure it doesn't happen again (plus I need to provide an explanation to the higher-ups).

    I have an ERS5698 IST clustered pair of switches running SW:v6.3.1.039, FW:6.0.0.16. The switches consist of 14 SMLTs spread across the 2 switches and an IST MLT link. The SMLT's all have the same VLANs configured on them.

    Basically what happened is I created a new MLT, SMLT, added the same VLANs and for some reason those VLANs were automatically removed from all of the other existing SMLT's and access and trunk ports.

    Here are is the MLT/SMLT/VLAN portion of the switch config:
    Code:
    [FONT=Courier New]vlan members 3000 1-24,47-48,93-96[/FONT]
[FONT=Courier New]vlan members 3001 1-24,47-48,93-96[/FONT]
[FONT=Courier New]vlan members 3002 1-24,47-48,93-96[/FONT]
[FONT=Courier New]vlan members 3999 47-48[/FONT]
 
[FONT=Courier New]mlt 1 enable member 1-2 [/FONT]
[FONT=Courier New]mlt 2 enable member 3-4 [/FONT]
[FONT=Courier New]mlt 3 enable member 5-6 [/FONT]
[FONT=Courier New]mlt 4 enable member 7-8 [/FONT]
[FONT=Courier New]mlt 5 enable member 9-10 [/FONT]
[FONT=Courier New]mlt 6 enable member 11-12 [/FONT]
[FONT=Courier New]mlt 7 enable member 13-14 [/FONT]
[FONT=Courier New]mlt 8 enable member 15-16 [/FONT]
[FONT=Courier New]mlt 9 enable member 17-18 [/FONT]
[FONT=Courier New]mlt 10 enable member 19-20 [/FONT]
[FONT=Courier New]mlt 11 enable member 21-22 [/FONT]
[FONT=Courier New]mlt 12 enable member 23-24 [/FONT]
[FONT=Courier New]mlt 29 enable member 93-94 [/FONT]
[FONT=Courier New]mlt 30 enable member 95-96 [/FONT]
[FONT=Courier New]! IST Link[/FONT]
[FONT=Courier New]mlt 31 enable member 47-48 [/FONT]
 
[FONT=Courier New]interface FastEthernet ALL[/FONT]
[FONT=Courier New]spanning-tree port 1-24,47-48,93-96 learning disable[/FONT]
[FONT=Courier New]exit[/FONT]
 
[FONT=Courier New]mlt spanning-tree 1 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 2 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 3 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 4 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 5 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 6 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 7 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 8 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 9 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 10 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 11 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 12 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 29 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 30 stp 1 learning disable[/FONT]
[FONT=Courier New]mlt spanning-tree 31 stp 1 learning disable[/FONT]
 
[FONT=Courier New]interface mlt 31[/FONT]
[FONT=Courier New]ist peer-ip 10.1.1.2[/FONT]
[FONT=Courier New]ist vlan 3999[/FONT]
[FONT=Courier New]ist enable[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 1[/FONT]
[FONT=Courier New]smlt 1[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 2[/FONT]
[FONT=Courier New]smlt 2[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 3[/FONT]
[FONT=Courier New]smlt 3[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 4[/FONT]
[FONT=Courier New]smlt 4[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 5[/FONT]
[FONT=Courier New]smlt 5[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 6[/FONT]
[FONT=Courier New]smlt 6[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 7[/FONT]
[FONT=Courier New]smlt 7[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 8[/FONT]
[FONT=Courier New]smlt 8[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 9[/FONT]
[FONT=Courier New]smlt 9[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 10[/FONT]
[FONT=Courier New]smlt 10[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 11[/FONT]
[FONT=Courier New]smlt 11[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 12[/FONT]
[FONT=Courier New]smlt 12[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 29[/FONT]
[FONT=Courier New]smlt 29[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]interface mlt 30[/FONT]
[FONT=Courier New]smlt 30[/FONT]
[FONT=Courier New]exit[/FONT]
    And once I applied the following changes to create the SMLT and add the VLANs to the unused ports 91, 92:

    Code:
    [FONT=Courier New]vlan ports 91,92 tagging tagAll filter-untagged-frame enable [/FONT]
[FONT=Courier New]vlan members 3000 91,92[/FONT]
[FONT=Courier New]vlan members 3001 91,92[/FONT]
[FONT=Courier New]vlan members 3002 91,92[/FONT]
 
[FONT=Courier New]interface FastEthernet ALL[/FONT]
[FONT=Courier New]spanning-tree port 91,92 learning disable[/FONT]
[FONT=Courier New]exit[/FONT]
 
[FONT=Courier New]mlt 28 name "new MLT" enable member 91,92 [/FONT]
[FONT=Courier New]mlt spanning-tree 28 stp 1 learning disable[/FONT]
 
[FONT=Courier New]interface mlt 28[/FONT]
[FONT=Courier New]smlt 28[/FONT]
[FONT=Courier New]exit[/FONT]
[FONT=Courier New]save config[/FONT]
    VLANs 3000, 3001, and 3002 were automatically removed from all of the other MLT's and Access Ports! Any idea what might have gone wrong? As expected, the Avaya ERS logs show nothing useful.

    If you think more details might help to clarify things, let me know and I will add as much as I can.

    Thanks in advance.
    Tags: None
  • kmanue
    Member
    • May 2011
    • 3
    #2
    A few additional details:

    The vlans were automatically removed on both switches. It might be worth noting that I had finished applying the same commands on both switches before I noticed any issues. However, based on the time frames of reported issues, it almost seems like applying the commands on the 1st switch is what removed the vlans from both ... i.e. I think everything "went down" (unbeknownst to me) before I had a chance to apply the commands to the 2nd switch.

    And actually, it seemed like I had to re-add the vlans to some of the ports twice: I re-added them on switch 1, moved to switch 2 and re-added to appropriate ports, then went back to switch 1 to verify but had to re-re-add to several ports again, etc (it seemed like the vlans were removed a 2nd or 3rd time).

    Any suggestions or thoughts on what might have happened would be greatly appreciated.

    Comment

    • kmanue
      Member
      • May 2011
      • 3
      #3
      Resolved ... I found my answer (below)

      vlan members 3000 91,92
      vlan members 3001 91,92
      vlan members 3002 91,92

      The above lines set VLAN 3000,3001 and 3002 to exist on ports 91 and 92. This is why they were removed from the other ports/MLT's.

      I should have entered the following

      vlan members add 3000 91,92
      vlan members add 3001 91,92
      vlan members add 3002 91,92

      Comment

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