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26942
Dell 6548P - duplicate VOIP SIP invites
Seeing duplicate SIP INVITES with Dell 6548P switches.
The first SIP INVITE shows up with the phone's Source address.
The second SIP INVITE shows up with the Dell Switch's Source address.
It's not a retransmitted SIP Invite. It is a duplicate.
The only difference is the SOURCE.
Any ideas what would cause this ?
First SIP Invite:
Second SIP Invite:
DELL-Willy M
802 Posts
1
May 1st, 2012 13:00
I think you mean 6248P and not 6548p. There are no 65xx PowerConnect switch models. This issue was addressed in firmware updates. Here is a link to the latest firmware 3.3.3.3 download for the 6248P switch.
www.dell.com/.../DriverFileFormats
Also we need to check your configuration for anything with the proxy-arp command on it via cli with the show run command. If you see proxy-arp and you have not configured it then it will need to be removed manually.
Please keep us updated,
DELL-Willy M
802 Posts
0
April 30th, 2012 11:00
Here is a good source document for configuring VOIP on a 55xx switch. Do you have 55xx switch or a 6xxx? I would also suggest updating to the current firmware.
en.community.dell.com/.../configuring-dell-powerconnect-55xx-series-switch-voice-vlan.aspx
From this link you can choose the switch model and then download the firmware if needed.
www.dell.com/.../NeedProductSelection
Hope this helps,
klashbrook44
4 Posts
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April 30th, 2012 13:00
We have nine 6548 switches
klashbrook44
4 Posts
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May 1st, 2012 09:00
Thanks for the link on the how-to guide.
Unfortunately, that only shows how to setup VOIP VLANS on the 55xx switches and is unrelated to our problem.
Our VOIP Traffic is already on its own VLAN.
We are seeing the Dell switches resend the SIP INVITE packets for no reason.
The packet capture also indicates "Resent Packet: True" in the SIP info.
So the question remains... what could be causing the Dell switches to resend the SIP Invite packet ???
klashbrook44
4 Posts
0
May 2nd, 2012 14:00
Yes... 6248P. Sorry, I typo'd that four times.
The firmware update appears to have immediately resolved the issue !
Thanks !!
DELL-Willy M
802 Posts
0
May 2nd, 2012 15:00
Great news! Glad to hear about the resolution.
Thanks for the update.