Nexus 7009 running image 6.2(2a)

Tabish Mirza · ‎12-09-2013

We have a pair of Nexus 7009 running image 6.2(2a). All the buling access switches 2960 are connected to them through ten gig uplink. When i do sh cdp neighbour on one of the buling switch to see the connectivity with Nexus core switches. It shows below output.

Access_SW01#sh cdp neighbor

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,

D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID Local Intrfce Holdtme Capability Platform Port ID

CS7009-A Ten 1/0/1 159 R S I C N7K-C7009 Eth 3/15

CS7009-B Ten 1/0/2 164 R S C N7K-C7009 Eth 3/15

My question is why it shows different Capability mean CS7009-A shows RSIC & CS7009-B shows RSC. Both core switches having identical software version, identical config & rest of the things.

Thanks

mwronkow · ‎12-09-2013

It appears IGMP isn't enabled on the B switch or has been disabled on e3/15.

What does 'sh ip igmp int e 3/15' report on 7009-B ?

Tabish Mirza · ‎12-09-2013

Matthew many thanks indeed for your prompt response but i would like to tell you that when i do sh cdp neighbour on other building access switch. It given different output & shows both link capability RSC. I really confused why it shows different different outputs. It supposed to be identical as I am running identical configuration on both core switches. Please advise

Access_SW02#sh cdp neighbors

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone,

D - Remote, C - CVTA, M - Two-port Mac Relay

Device ID Local Intrfce Holdtme Capability Platform Port ID

CS7009-A Ten 1/0/1 142 R S C N7K-C7009 Eth 3/13

CS7009-B Ten 1/0/2 132 R S C N7K-C7009 Eth 3/13

mwronkow · ‎12-09-2013

Please capture 'sh ip igmp int e 3/15' for BOTH 7009s.

-mw

Tabish Mirza · ‎12-11-2013

Dear Matthew,

Please find requested output.

sh ip igmp interface ethernet 3/15

CS7009-A# sh ip igmp interface ethernet 3/15

IGMP is disabled on Ethernet3/15

!

CS7009-B# sh ip igmp interface ethernet 3/15

IGMP is disabled on Ethernet3/15

sh cdp neighbors interface ethernet 3/15 CS01

CS7009-A# sh cdp neighbors interface ethernet 3/15

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

Access_SW01 Eth3/15 173 S I WS-C2960S-48F Ten1/0/1

CS7009-A# sh cdp neighbors interface ethernet 3/15 detail

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

Device ID:Access_SW01

VTP Management Domain Name: XYZ-Domain

Interface address(es):

IPv4 Address: 1.1.1.1

Platform: WS-C2960S-48F, Capabilities: Switch IGMP Filtering

Interface: Ethernet3/15, Port ID (outgoing port): TenGigabitEthernet1/0/1

Holdtime: 167 sec

Version:

Cisco IOS Software, C2960S Software (C2960S-UNIVERSALK9-M), Version 12.2(58)SE2, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Compiled Thu 21-Jul-11 02:22 by prod_rel_team

Advertisement Version: 2

Native VLAN: 1

Duplex: full

Mgmt address(es):

IPv4 Address: 1.1.1.1

Thanks

prasad.gsmc · ‎12-31-2013

Hope you have not enabled bundling...

Might be due to any multicast enabled vlan active via int E1/15 of switch a. E1/13 might be carrying different set of vlan.... wild wild guess.

Amit Singh · ‎01-18-2014

Can we have a look at the N7K configs and one of the 2960 configs if they are identical.

Cheers,

-amit singh