WS-X6548-GE-TX/Etherchannel

Unanswered Question
Apr 3rd, 2008
User Badges:

Hi,


The following excerpt is taken from Cisco documentation:


The WS-X6548-GE-TX, WS-X6548V-GE-TX, WS-X6148-GE-TX, and WS-X6148V-GE-TX modules have a limitation with EtherChannel. For EtherChannel, the data from all links in a bundle goes to the port ASIC, even though the data is destined for another link. This data consumes bandwidth in the 1-Gigabit Ethernet link. For these modules, the sum total of all data on an EtherChannel cannot exceed 1 Gigabit.


Does this apply to etherchannels that are created over multiple modules? ie: An 8 link etherchannel that has (card/port) 3/4, 4/4, 5/4, 6/4, 8/4, 9/4, 10/4, 11/4. Or does it apply to Etherchannel configurations on each module?

This configuration has the WS-X6548-GE-TX module and the SFM2 mod.


Any advice would be brilliant..


Regards

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 3 (1 ratings)
Loading.
Edison Ortiz Thu, 04/03/2008 - 08:44
User Badges:
  • Super Bronze, 10000 points or more
  • Hall of Fame,

    Founding Member

What the document is trying to explain is that the 6548 and 6148 are oversubscribed modules.


Which means a group of 8 ports can only provide 1Gbps throughput combined (8:1 oversubscribed).


If you were to configure an etherchannel for bandwidth aggregation, keep in mind to have the bundle ports on different modules in order to sustain maximum throughput and avoid packet loss.


HTH,


__


Edison.

Actions

This Discussion