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Advice, VOIP and DATA on 3500XL switch 7940 SIP phone

Here is what I have:

Residential internet (dynamic IP)

Linksys wrt54 router with dd-wrt firmware

Cisco c3500XL switch with v12 firmware (WS-C3524-PWR-XL-EN)

2 7940's with SIP firmware

1 asterisk PBX with with Elastix

10 Computers

Here is what I need:

Advice  on how best to set up the switch for voip and data. I've only done one  thing to the switch so far: a factory reset of the config and turned on  'switchport trunk encapsulation dot1q' for f0/24 (hooked up the router  to port f0/24).

As  it stands, everything is working, but I know the setup is not ideal.  The phones get their inline power and IP address, but they take a long  time to boot up (phones display "configuring vlan" for a long time after  reboot).

The PBX system sees the phones and can deliver config data.

My Questions:

1)  What type of VLAN setup do you recommend I put on the switch  considering I do not have an advanced router? I've read having voip and  data on separate vlans is a good idea. But still do not know why...

2) How should I configue the ports for:

A) Computers only

B) Phones only

C) Phones and Computers

Thanks for any advice.

xpost from https://learningnetwork.cisco.com/thread/44693

1 REPLY 1
Advocate

Advice, VOIP and DATA on 3500XL switch 7940 SIP phone

Hi Burt,

For a small network with only 2 phones you only need
1 vlan.

The switch will already have the default VLAN 1 configured.

Is your eouter running more than 1 vlan ?
If it is not then you should connect it to an
access port not a trunk.

If you need to run more vlans you will need to
set up routing between the vlans and external access
on your router.

Default the switch again

!
erase start
!

Reload

Reconfigure every interface to use spanning tree portfast

!
int fas 0/1
spanning-tree portfast
no shut
!
!
int fas 0/2
spanning-tree portfast
no shut
!
!
int fas 0/3
spanning-tree portfast
no shut
!
etc etc

This will speed up connectivity to your devices.

The config manual for these old switches is still available at:-
http://www.cisco.com/en/US/docs/switches/lan/catalyst2900xl_3500xl/release12.0_5_wc_1_/swg/sc.html

Regards,
Alex.
Please rate useful posts.

Regards, Alex. Please rate useful posts.
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