[c-nsp] 6500 xconnect port-channel?

[Benjamin Lovell]

I would test this for load-sharing with your traffic profile. It's been a while since I looked at this but I think the port channel hashing criteria is limited when xconnect terminates to a port-channel. 

If I remember correctly we cannot do port channel hash on IP header when coming off an EoMPLS tunnel. So if all/alot of traffic has same MAC then you will get sub-optimal load-sharing. 

-Ben


-Ben


On Jul 14, 2010, at 7:46 AM, Peter Rathlev wrote:

> Hi,
> 
> Would anybody have any comments on doing port-mode EoMPLS xconnects on
> port-channels on Sup720 running SXI?
> 
> We're contemplating delivering EoMPLS PtP this way. In or "normal" setup
> we connect a "switchport trunk" from the downlink device to a port-mode
> EoMPLS-port, plain and simple.
> 
> My guess is that there's nothing wrong with doing this via port-channels
> instead. It seems to work, and the documentation hints at it being
> supported[1] but is it a bad idea for some reason?
> 
> Example configuration from the "normal" setup:
> 
> ! *** CE device ***
> interface GigabitEthernet0/24
> description Uplink to PE1 Gi1/1
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport nonegotiate
> !
> 
> ! *** PE device ***
> interface GigabitEthernet1/1
> description Downlink to CE1 Gi0/24
> mtu 9216
> no ip address
> udld port disable
> xconnect 192.0.2.10 1234 encapsulation mpls
> !
> 
> We would like to do something like this:
> 
> ! *** CE device ***
> interface GigabitEthernet0/23
> description Uplink to PE1 Gi1/1
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport nonegotiate
> channel-group 1 mode on
> !
> interface GigabitEthernet0/24
> description Uplink to PE1 Gi1/2
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport nonegotiate
> channel-group 1 mode on
> !
> interface Port-channel1
> description Uplink to PE1 Po1
> switchport trunk encapsulation dot1q
> switchport mode trunk
> switchport nonegotiate
> !
> 
> ! *** PE device ***
> interface GigabitEthernet1/1
> description Downlink to CE1 Gi0/23
> no ip address
> channel-group 1 mode on
> !
> interface GigabitEthernet1/2
> description Downlink to CE1 Gi0/24
> no ip address
> channel-group 1 mode on
> !
> interface Port-channel1
> description Downlink to CE1 Po1
> no ip address
> xconnect 192.0.2.10 1234 encapsulation mpls
> !
> 
> This is without relevant MTU adjustments and so on. Just the EoMPLS
> configuration.
> 
> [1]: Catalyst 6500 Release 12.2SXH and Later Software Configuration
> Guide, Configuring Multiprotocol Label Switching
> http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/configuration/guide/pfc3mpls.html
> 
> -- 
> Peter
> 
> 
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