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IGMP feature missing after upgrading NX-OS

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Applies to

  • N9K-C9336C-FX2
  • NX-OS Upgrade
  • AFF or FAS
  • MCCIP

Issue

  • Some ports lost the IGMP feature when running the show cdp neighbors command

Sw2# show cdp neighbors
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater,
                  V - VoIP-Phone, D - Remotely-Managed-Device,
                  s - Supports-STP-Dispute

Device-ID          Local Intrfce  Hldtme Capability  Platform      Port ID
Node01          Eth1/1 145    H                 AFF-A800       e1a
Node02          Eth1/2         128    H         AFF-A800       e1a
mccip_1.3_sw1(XXXXXXXXX)
                    Eth1/7         176    R S s     N9K-C9336C-FX  Eth1/7
mccip_1.3_sw1(XXXXXXXXX)
                    Eth1/8         176    R S s     N9K-C9336C-FX  Eth1/8
mccip_1.9_sw2(XXXXXXXXX)
                    Eth1/15   176    R S I s   N9K-C9336C-FX       Eth1/15
mccip_1.9_sw2(XXXXXXXXX)
                    Eth1/16        176    R S I s N9K-C9336C-FX    Eth1/16

 

  • In certain instances following a switch upgrade, we observe that one switch fails to display any IGMP capabilities in the show CDP outputs, while another switch does show these capabilities on its ISL ports.
  • From Switch logs: Switch2 (Display IGMP capabilities)

`show cdp neighbors`
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater,
                  V - VoIP-Phone, D - Remotely-Managed-Device,
                  s - Supports-STP-Dispute

Device-ID          Local Intrfce  Hldtme Capability  Platform      Port ID
switch2(FDOXXXX1AXX)
                    mgmt0          126    R S s     N9K-C93180YC-FX3 Eth1/9        
Node-01      Eth1/7         157    H         AFF-A400         e3b          
Node-02      Eth1/8         156    H         AFF-A400         e3b          
Node-03      Eth1/9         156    H         AFF-A400         e3b          
Node-04      Eth1/10        167    H         AFF-A400         e3b          
switch1(FDOXXXX1AXX)
                    Eth1/35        177    R S I s   N9K-C9336C-FX2   Eth1/35      
switch2(FDOXXXX1AXX)
                    Eth1/36        177    R S I s  N9K-C9336C-FX2   Eth1/36      

`show cdp neighbors detail`
Interface address(es): 1
    IPv4 Address: 147.167.XX.XXX
Platform: N9K-C9336C-FX2, Capabilities: Router Switch IGMP Filtering Supports-STP-Dispute
Interface: Ethernet1/35, Port ID (outgoing port): Ethernet1/35
Holdtime: 177 sec

Interface address(es): 1
    IPv4 Address: 147.167.XX.XXX
Platform: N9K-C9336C-FX2, Capabilities: Router Switch IGMP Filtering Supports-STP-Dispute
Interface: Ethernet1/36, Port ID (outgoing port): Ethernet1/36
Holdtime: 177 sec

 

  • From Switch: Switch1 (Does not display IGMP capabilities)

`show cdp neighbors`
Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater,
                  V - VoIP-Phone, D - Remotely-Managed-Device,
                  s - Supports-STP-Dispute

Device-ID          Local Intrfce  Hldtme Capability  Platform      Port ID
Switch1(FDOXXXX1AXX)
                    mgmt0          170    R S s     N9K-C93180YC-FX3 Eth1/9        
Node-01      Eth1/7         148    H         AFF-A400         e3a          
Node-02      Eth1/8         147    H         AFF-A400         e3a          
Node-03      Eth1/9         146    H         AFF-A400         e3a          
Node-04      Eth1/10        157    H         AFF-A400         e3a          
switch1(FDOXXXX1AXX)
                    Eth1/35        178    R S s     N9K-C9336C-FX2   Eth1/35      
switch2(FDOXXXX1AXX)
                    Eth1/36        178    R S s     N9K-C9336C-FX2   Eth1/36  

`show cdp neighbors detail`
Interface address(es): 1
    IPv4 Address: 147.167.XX.XXX
Platform: N9K-C9336C-FX2, Capabilities: Router Switch Supports-STP-Dispute
Interface: Ethernet1/35, Port ID (outgoing port): Ethernet1/35
Holdtime: 178 sec

Interface address(es): 1
IPv4 Address: 147.167.XX.XXX
Platform: N9K-C9336C-FX2, Capabilities: Router Switch Supports-STP-Dispute
Interface: Ethernet1/36, Port ID (outgoing port): Ethernet1/36
Holdtime: 178 sec

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