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Load Balancing @ L2

james.hughes
Level 1
Level 1

‎09-05-2007 05:31 AM - edited ‎03-05-2019 06:17 PM

Hi - i have 2 x L2 WAN links between buildings.

1 = 1G wireless (seen by the switch as an L1 cable)

1 = 155Mb ISP (seen by switch as an L1 cable)

Right now they're set up in RSTP, but it would be great to utilize the very expensive 155Mb link no-just when the primary link is down.

Any ideas?

L3 obviously easy, L2 challenging.

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3 Replies 3

kerek
Level 4
Level 4

‎09-05-2007 05:37 AM

Hi,

If you get those links on Ethernet interface and both are transparent you can try out L2 ether channel.

Since the two links have different delays you may have problems.

Krisztian

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james.hughes
Level 1
Level 1
In response to kerek

‎09-05-2007 05:40 AM

Hi Krisztian,

I can't really use Etherchannel as they're not equal bandwidth.

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kerek
Level 4
Level 4
In response to james.hughes

‎09-05-2007 05:45 AM

Hello,

Are these configured as trunk or access. If configured as trunk you can tune the STP to use one link for few vlans and to use the other link for the rest.

Krisztian

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