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Webcast-Catalyst9k
New Member

2 Cat 6500 Native IOS - 4-port Gigachannel between Sup Ports

I have 2 core Catalyst 6500s both with redundant SupII's. I want to use all 4-ports on each switch for a Gigachannel connection. It looks like 1 port on each SupII module is put in standby mode and can't be part of the Giga-channel connection.

Is this correct?

4 REPLIES
Cisco Employee

Re: 2 Cat 6500 Native IOS - 4-port Gigachannel between Sup Ports

In 6500, you can use all 4 uplink ports on active and standby Supervisors. I beleieve you are confusing yourself with the uplink port restriction with Sup2+,4,5 in 450xxR chassis.

New Member

Re: 2 Cat 6500 Native IOS - 4-port Gigachannel between Sup Ports

Is there any special configuration? I configured all port identical with channel-group 1 on and each switch has 2 of the 4 ports with amber lights.

Cisco Employee

Re: 2 Cat 6500 Native IOS - 4-port Gigachannel between Sup Ports

Can you paste output of the following commands from both the switches

sh run

sh spanning-tree interface gig x/y

sh etherchannel summary

New Member

Re: 2 Cat 6500 Native IOS - 4-port Gigachannel between Sup Ports

Sho Run On both switches g1/1 - g2/2 are exactly as below.

interface GigabitEthernet1/1

wrr-queue bandwidth 30 70

wrr-queue queue-limit 40 30

wrr-queue random-detect min-threshold 1 40 80

wrr-queue random-detect min-threshold 2 70 80

wrr-queue random-detect max-threshold 1 80 100

wrr-queue random-detect max-threshold 2 80 100

mls qos trust cos

switchport

switchport trunk encapsulation dot1q

switchport mode trunk

rmon collection stats 6000 owner monitor

channel-group 1 mode on

Show spanning-tree interface g1/1 - 2/2 looks the same on both switches. 1/1 and 2/1 have infromation, 1/2 and 2/2 have no spanning-tree information.

SHW-Chi-Lan1#show spann int g1/1

Vlan Role Sts Cost Prio.Nbr Type

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

VLAN0001 Desg FWD 3 128.833 P2p

VLAN0002 Desg FWD 3 128.833 P2p

VLAN0007 Desg FWD 3 128.833 P2p

VLAN0008 Desg FWD 3 128.833 P2p

VLAN0066 Desg FWD 3 128.833 P2p

VLAN0068 Desg FWD 3 128.833 P2p

VLAN0069 Desg FWD 3 128.833 P2p

VLAN0071 Desg FWD 3 128.833 P2p

VLAN0072 Desg FWD 3 128.833 P2p

VLAN0073 Desg FWD 3 128.833 P2p

VLAN0074 Desg FWD 3 128.833 P2p

VLAN0075 Desg FWD 3 128.833 P2p

VLAN0099 Desg FWD 3 128.833 P2p

VLAN0100 Desg FWD 3 128.833 P2p

VLAN0101 Desg FWD 3 128.833 P2p

VLAN0107 Desg FWD 3 128.833 P2p

VLAN0166 Desg FWD 3 128.833 P2p

VLAN0168 Desg FWD 3 128.833 P2p

VLAN0169 Desg FWD 3 128.833 P2p

VLAN0171 Desg FWD 3 128.833 P2p

VLAN0172 Desg FWD 3 128.833 P2p

Vlan Role Sts Cost Prio.Nbr Type

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

VLAN0173 Desg FWD 3 128.833 P2p

VLAN0174 Desg FWD 3 128.833 P2p

VLAN0175 Desg FWD 3 128.833 P2p

VLAN0191 Desg FWD 3 128.833 P2p

VLAN0192 Desg FWD 3 128.833 P2p

VLAN0193 Desg FWD 3 128.833 P2p

VLAN0194 Desg FWD 3 128.833 P2p

VLAN0195 Desg FWD 3 128.833 P2p

VLAN0196 Desg FWD 3 128.833 P2p

VLAN0197 Desg FWD 3 128.833 P2p

VLAN0198 Desg FWD 3 128.833 P2p

VLAN0200 Desg FWD 3 128.833 P2p

VLAN0201 Desg FWD 3 128.833 P2p

VLAN0202 Desg FWD 3 128.833 P2p

VLAN0999 Desg FWD 3 128.833 P2p

SHW-Chi-Lan1#show spann int g1/2

no spanning tree info available for GigabitEthernet1/2

The show etherchannel summary is the same on both switches.

SHW-Chi-Lan1#show etherchannel summary

Flags: D - down P - in port-channel

I - stand-alone s - suspended

H - Hot-standby (LACP only)

R - Layer3 S - Layer2

U - in use f - failed to allocate aggregator

u - unsuitable for bundling

Number of channel-groups in use: 5

Number of aggregators: 5

Group Port-channel Protocol Ports

------+-------------+-----------+--------------------

1 Po1(SU) Gi1/1(P) Gi1/2(D)

Gi2/1(P) Gi2/2(D)

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