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Port-Channel Interface Bandwidth

Posted on 2014-10-24
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Last Modified: 2014-10-24
I have configured a port channel interface that bundle 2 Ethernet interfaces (10000 Kbits each), I was expecting to see the Bandwidth of the port-channel to be 20000 Kbits, but it shows 100000Kbits.
I would like to know how it came up with this number.

Thanks
SW1#show etherchannel summary 
    Number of channel-groups in use: 2
Number of aggregators:           2

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SD)          -        Et0/0(D)    Et0/1(D)    

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SW1#show interfaces e0/0 | include BW
  MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec, 
SW1#

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SW1#show interfaces e0/1 | include BW
  MTU 1500 bytes, BW 10000 Kbit/sec, DLY 1000 usec, 
SW1#

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SW1#show interfaces port-channel 1 | include BW
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec, 
SW1#

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Question by:jskfan
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6 Comments
 
LVL 30

Assisted Solution

by:Predrag
Predrag earned 2000 total points
ID: 40401947
Po1(SD)          -        Et0/0(D)    Et0/1(D)    

Your channel is down. When bundled in etherchannel should be something like

Po1(SU)         -      Et0/0(P)    Et0/1(P)

#sh etherchannel summary
Flags:  D - down        P - bundled 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
        M - not in use, minimum links not met
        u - unsuitable for bundling
        w - waiting to be aggregated
        d - default port
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Author Comment

by:jskfan
ID: 40402169
One port channel BW shows correct , but the other does not.


SW1#sh etherchannel summary 
    
Number of channel-groups in use: 2
Number of aggregators:           2

Group  Port-channel  Protocol    Ports
------+-------------+-----------+-----------------------------------------------
1      Po1(SU)          -        Et0/0(P)    Et0/1(P)    
2      Po2(SU)          -        Et0/2(P)    Et0/3(P)    

SW1#

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SW1#sh interfaces port-channel 1 | include BW
  MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec, 
SW1#sh interfaces port-channel 2 | include BW
  MTU 1500 bytes, BW 20000 Kbit/sec, DLY 1000 usec, 
SW1#

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LVL 30

Accepted Solution

by:
Predrag earned 2000 total points
ID: 40402187
Probably some misconfiguration on ports:
Delete port channel and set interfaces to default config, and try again.
Setting on interfaces (on both side) must be the same. (Po1 has DLY 100 usec, Po2 DLY 1000 usec - one of them is not at default value - and that's the probable reason for error - switch from other side probably have some different setting than SW1) :)

You cab restore interfaces to their defaults (under interface) with
Router(config-if)#default interface fa0/0
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Author Comment

by:jskfan
ID: 40402486
Reload ...fixed it..Thanks
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Author Closing Comment

by:jskfan
ID: 40402488
Thanks
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LVL 30

Expert Comment

by:Predrag
ID: 40402497
Any time. :)
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