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Ryan Curry Tue, 02/21/2012 - 07:45
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Are you asking how many ports are allowed in a port channel?  If so, 8 is the max and they must all be of the same type (speed, duplex, etc.) and configuration (i.e. trunk or access as well as allowed VLANs).  Hope that helps.

vmiller Tue, 02/21/2012 - 07:54
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For IOS12.2.18 you can create a maximum of 128 etherchannels, subject to the constraints listed above.

For CATos  I bleieve ther is a limitation in some chassis to 63.

Ryan Curry Tue, 02/21/2012 - 08:26
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Well, there you go, it's not the first time I've been wrong ...

viswamin Tue, 02/21/2012 - 08:33
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I think vmiller was talking about No. of EtherChannels and you were talking about No. of ports in an Etherchannel... Both are different and you were not wrong AFAIK.


-Vijay

Jovan Bogoev Thu, 11/08/2012 - 18:10
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Beware of trying to port-channel interfaces across different line cards. The QoS scheduling can be different and not allow a port-channel to come up. See the difference below:


sh int te7/12 cap

TenGigabitEthernet7/12

  Model:                 WS-X6716-10GE

  Type:                  10Gbase-SR

  Speed:                 10000

  Duplex:                full

  Trunk encap. type:     802.1Q

  Trunk mode:            on,off,desirable,nonegotiate

  Channel:               yes

  Broadcast suppression: percentage(0-100)

  Flowcontrol:           rx-(off,on),tx-(off,on)

  Membership:            static

  Fast Start:            yes

  QOS scheduling:        rx-(1p7q2t), tx-(1p7q4t)

  QOS queueing mode:     rx-(cos,dscp), tx-(cos,dscp)

  CoS rewrite:           yes

  ToS rewrite:           yes

  Inline power:          no

  Inline power policing: no

  SPAN:                  source/destination

  UDLD                   yes

  Link Debounce:         yes

  Link Debounce Time:    yes

  Ports-in-ASIC (Sub-port ASIC) : 9-16 (9-12)

  Remote switch uplink:  no

  Dot1x:                 yes

  Port-Security:         yes


sh int te6/1 cap

TenGigabitEthernet6/1

  Model:                 WS-X6708-10GE

  Type:                  10Gbase-SR

  Speed:                 10000

  Duplex:                full

  Trunk encap. type:     802.1Q,ISL

  Trunk mode:            on,off,desirable,nonegotiate

  Channel:               yes

  Broadcast suppression: percentage(0-100)

  Flowcontrol:           rx-(off,on),tx-(off,on)

  Membership:            static

  Fast Start:            yes

QOS scheduling:        rx-(8q4t), tx-(1p7q4t)

  QOS queueing mode:     rx-(cos,dscp), tx-(cos,dscp)

  CoS rewrite:           yes

  ToS rewrite:           yes

  Inline power:          no

  Inline power policing: no

  SPAN:                  source/destination

  UDLD                   yes

  Link Debounce:         yes

  Link Debounce Time:    yes

  Ports-in-ASIC (Sub-port ASIC) : 1,4-5,7 (1)

  Remote switch uplink:  no

  Dot1x:                 yes

  Port-Security:         yes


This is the error you will see:


%EC-SP-5-CANNOT_BUNDLE2: Te7/12 is not compatible with Te6/1 and will be suspended (qos-card types of Te7/12 do not match Te6/1)


Enter the command below on the port-channel to allow the grouping of the ports

#no mls qos channel-consistency



That being said I hope I can bundle interfaces of different optic types i.e. 10Gbase-SR and 10Gbase-LRM

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