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<TITLE>[cisco-voip] 7960 and 3550 Trunking/VLAN</TITLE>
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<DIV>I'm not sure but I think the phones have to get a new firmware update to
send the right cdp packets to let the switch know they should be on a voice
vlan. </DIV>
<DIV> </DIV>
<DIV>scott</DIV>
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<DIV><FONT size=2>-----Original Message----- <BR><B>From:</B> Vandy Hamidi
[mailto:vandy.hamidi@markettools.com] <BR><B>Sent:</B> Mon 3/15/2004 6:39 PM
<BR><B>To:</B> cisco-voip@puck.nether.net <BR><B>Cc:</B> <BR><B>Subject:</B>
[cisco-voip] 7960 and 3550 Trunking/VLAN<BR><BR></FONT></DIV>
<P><FONT size=2>In one of our remote offices, new phones are not coming up in
the call<BR>manager.<BR>We have a 2651XM providing DHCP on VLAN 4 (the voice
VLAN) and it's also<BR>on VLAN 1, the data/server/pc VLAN.<BR>Initial
troubleshooting is showing:<BR>1) DHCP Requests are making it to the router,
but the phone isn't<BR>finalizing the lease<BR>2) Our Windows Server, which
provides DHCP to the PCs (on VLAN 1) is<BR>receiving the DHCP requests and
providing an IP address for the 7960.<BR>3) The 7960 gets a VLAN 1 Subnet IP
address but it's in VLAN 4.<BR><BR>So both VLANS are getting the DHCP
broadcast, but it looks like the<BR>windows server is winning out.<BR>VLAN 1
should not be receiving a DHCP broadcast.<BR><BR>This is how the phones port
(Fa0/5) is configured on the 3550 switch:<BR>interface
FastEthernet0/5<BR>
description VLAN1+Aux4
w/Power<BR> switchport mode
access<BR> switchport voice
vlan 4<BR> no ip
address<BR> spanning-tree
portfast<BR><BR>I set "switchport access vlan 4" so that both the data and
voice vlans<BR>were on vlan 4.<BR>Only then did it come up with the right DHCP
address and register to the<BR>CM.<BR>After it comes up, you can switch back
to VLAN 1 and it works fine.<BR><BR>This is happening with EVERY new phone I
add. The existing phones are<BR>totally happy and have been for several
months. All phones on that<BR>location are preconfigured before they are
on location. These are the<BR>first phones that were not
preconfigured.<BR><BR>The 2651 does not have boothelper configured or anything
like that.<BR>It's very basic with a simple DHCP
command.<BR> ip dhcp
excluded-address 10.24.4.0
10.24.4.255<BR> ip dhcp
excluded-address 10.24.6.0
10.24.7.255<BR>
!<BR> ip dhcp pool
DHCP-VOIP-VLAN4<BR>
network 10.24.4.0
255.255.252.0<BR>
dns-server 10.24.0.32 10.10.0.11
10.10.0.19<BR>
option 150 ip 10.8.4.10
10.8.4.11<BR>
default-router 10.24.4.1<BR><BR>The
"no ip bootp server" command is set, but phones should use BootP,<BR>not DHCP,
right? The existing phones work just fine and get their IP<BR>addresses
just fine as well.<BR><BR>
-=Vandy=-<BR><BR><BR><BR>_______________________________________________<BR>cisco-voip
mailing list<BR>cisco-voip@puck.nether.net<BR><A
href="https://puck.nether.net/mailman/listinfo/cisco-voip">https://puck.nether.net/mailman/listinfo/cisco-voip</A><BR></FONT></P></BLOCKQUOTE>
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