ESW500 Link Aggreagate & Voice

[mabucham7]

Hello Everyone,

    My topology is as follows:

1- Cisco UC520

2- 2 x ESW520 24 port POE

   Uplink from the UC520 is connected to G1 on switch 1 and G2 on switch 1 is connected to G1 on the second switch. Now I have added another switch SG300-20 to the collection to be used only with servers, and was able to connect ports 17 & 19 in LACP to switch 2 (G2,G4) without voice lan (VLAN 100). Since i dont want to pass the voice vlan to the SG300, i wanted to setup LAG between the ESW (G2,G4 Switch 1 & G1,G3 Switch 2) keeping both vlans (VLAN 1 & 100) between the switches for our IP Phones. Each time i setup EtherChannels i loose connectivity from the IP Phones to the UC520, so my question is how can i setup the LAG with both VLANs between the switches ???

Regards

[Tom Watts]

Hi Muhi, I am assuming the UC520 CDP messages did the provisioning for your configuration on the ESW switches. I think you're running in to conflict on the smart port. You may want to disable the smart port for the ports interconnecting the ESW's and see if that makes the difference.

-Tom
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[mabucham7]

Hello Tom,

   Well I already tried this, plus i have used the following tutorial to make sure i am doing the right thing

https://supportforums.cisco.com/docs/DOC-33148

   Could it be the VLAN 100 (cisco-voice) is not being added to the EtherChannel Group hence the ip phones cannot see the UC520  ??? if you think so too how can i check ??

Regards

[Tom Watts]

Hi Muhi, to the best of my recollection, this documentation is accurate. You should manually tag VLAN 100 on the etherchannel on the VLAN to Port configuration.

-Tom
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[mabucham7]

Hello again,

   Well i have just tried it again, and still no luck, when i reach step where i want to add the vlan 100, etherchannel 1 mode is access and not trunk, and when i press on join vlan, i cannot put both vlans on the right side and in tagged mode, only 1 vlan is allowed, and i guess this is my problem on both switches, so can you help

Regards

[Tom Watts · Accepted solution]

VLAN & Port Settings > VLAN Management > Interface Settings

.

Choose etherchannel

set this to TRUNK

-Tom
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[mabucham7]

Thank you sir very much both LAGs are up and running with both vlans