• Status: Solved
  • Priority: Medium
  • Security: Public
  • Views: 2890
  • Last Modified:

Cisco EtherChannel Port Limits

We have a couple of Cisco WS-C3560E-24TD switches and a several more WS-C2960S-48TS-L switches.  I have not been able to find our how many ports on each device can be assigned to an EtherChannel trunk or how many trunks are allowed on each switch.

Any help is appreciated.
0
lpg1068
Asked:
lpg1068
  • 2
  • 2
1 Solution
 
Garry GlendownConsulting and Network/Security SpecialistCommented:
2960S is limited to a maximum of 8 physical ports,3560E should be the same ... please note that there are other limits you may hit by putting together that many ports (number of ARP requests, etc.)

2960 can have up to 6 channel groups, the 3560E I have access to at the moment would allow up to 48 ports (at least as far as the interface number that's allowed), can't find the docs that list the actual number ...
0
 
lpg1068Author Commented:
I'm new to Cisco and didn't think to try the command 'show etherchannel'

Some output from our 2960...

Group: 1
----------
Group state = L2
Ports: 4   Maxports = 16
Port-channels: 1 Max Port-channels = 16
Protocol:   LACP
Minimum Links: 0

This would lead me to believe that we can have up a combination of 16 ports and 16 channels per switch.  The 3560 gave me the same results and is running 14 ports and 5 groups right now.
0
 
Garry GlendownConsulting and Network/Security SpecialistCommented:
Negative, the 2960S will only allow up to 6 port channels to be configured ... try the "conf t" and "int port-channel ?", it will suggest 1-6 as valid options. As for the number of physical ports, I can't find an appropriate document from Cisco that would specify the maximum ...
Anyway, if you have a switch that's not in production use (or has a sufficient number of free ports), just try sticking them all into one port channel and see whether the IOS will let you put 16 in there ...
1
 
lpg1068Author Commented:
Yeah, I will have to try hit the maximums by trial and error.  I can't find any documentation either.  Thanks for the help.
0

Featured Post

How to Use the Help Bell

Need to boost the visibility of your question for solutions? Use the Experts Exchange Help Bell to confirm priority levels and contact subject-matter experts for question attention.  Check out this how-to article for more information.

  • 2
  • 2
Tackle projects and never again get stuck behind a technical roadblock.
Join Now