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Community Member

Using different sized links for redundancy

We currently use two 1GB fiber links in an Etherchannel between our two sites.  We'd like to upgrade the backbone to 10GB, but I'm wondering if it is possible to use one link at 10GB and keep the backup link at 1GB, just in case management won't approve the total amount of funds required.  Is Etherchannel over two separately sized links even possible?  Could it be done using Flexlink instead? The two switches being connected are 3750 stacks, so the links are currently crossing stacks (again, for redundancy)

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VIP Super Bronze

Using different sized links for redundancy

When creating a Portchannel the speed and duplex must be the same for all links in it.  So, you can't have a 1gig and a 10gig in an Etherchannle.  You can run flexlink or use spanning tree to block the gig link and use the 10gig as primary.

HTH

2 REPLIES
VIP Super Bronze

Using different sized links for redundancy

When creating a Portchannel the speed and duplex must be the same for all links in it.  So, you can't have a 1gig and a 10gig in an Etherchannle.  You can run flexlink or use spanning tree to block the gig link and use the 10gig as primary.

HTH

Community Member

Using different sized links for redundancy

So it IS possible to do it with Flexlink...  that's good to know.  Thanks.

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