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тАО10-12-2008 03:52 PM
тАО10-12-2008 03:52 PM
DHCP, VLAN, VOIP Phones
I have a 3500 switch with a number of vlans on then (data100 and voice101) these are connected to edge switches with a default vlan, data100 and voice101 vlans on them.
The edge switches are configured as follows.
vlan 1
name "DEFAULT_VLAN"
untagged 49-50
ip address 10.8.0.3 255.255.255.192
no untagged 1-48
exit
vlan 100
name "Data"
untagged 1-48
tagged 49-50
exit
vlan 101
name "Voice"
tagged 1-50
voice
exit
The core is configured as such
vlan 1
name "DEFAULT_VLAN"
untagged 1-8,12,15-18,Trk1
ip address 10.8.0.1 255.255.255.192
no untagged 9-11,13-14,19-20
exit
vlan 14
name "Production"
untagged 9-10,19-20
ip address 10.8.1.254 255.255.255.0
tagged Trk1
exit
vlan 16
name "Avaya Phone"
untagged 13-14
ip helper-address 10.8.1.1
ip address 10.8.116.254 255.255.255.0
tagged Trk1
exit
vlan 100
name "Data"
ip helper-address 10.8.1.1
ip address 10.8.10.254 255.255.255.0
tagged 1-2,7,Trk1
exit
vlan 101
name "Voice"
ip helper-address 10.8.1.1
ip address 10.8.11.254 255.255.255.0
tagged 1-2,7,Trk1
voice
exit
The 3 edge switches are plugged from port 50 into ports 2, 3 & 7 on the core switch.
Devices plugged into edges 2 & 3 work fine, get IP addresses as do the VOIP phones, however, no devices get any ip addresses from the 3rd edge switch (all edges are configured the same)
The link between edges 1&2 are cat5 the 3rd is over a point-to-point bridge.
I have run wireshark on the DHCP server and see the DHCP discover packets coming from the devices plugged into the 3rd egde. I do not see and DHCP offer back out to the 3rd edge.
I have rebuilt the DHCP server but to no avail.
Any ideas
(Oh and sorry for the long winded version) :)
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тАО10-12-2008 09:52 PM
тАО10-12-2008 09:52 PM
Re: DHCP, VLAN, VOIP Phones
whic port connect on switch point to point bridge device ?
I'm not see ip routing enable on core switch
you can use ip helper address command must be ip routing enable.
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тАО10-13-2008 05:18 AM
тАО10-13-2008 05:18 AM
Re: DHCP, VLAN, VOIP Phones
Is it common practice for 3rd parties to block broadcasts from a bridge link?
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тАО10-13-2008 06:07 AM
тАО10-13-2008 06:07 AM
Re: DHCP, VLAN, VOIP Phones
Just got off the phone from the 3rd party supplier of the point-to-point link.
They have said that the DHCP broadcasts are making it across the link but the other end is not passing it from the WAN to LAN interfaces so fingers crossed its that.
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тАО10-13-2008 06:51 AM
тАО10-13-2008 06:51 AM
Re: DHCP, VLAN, VOIP Phones
vlan 1 untag member
vlan 101 tag member
very good config
but which port connect point to point bridge device on other edge switch
your edge switch config
point to point bridge device connect must be int 49 or 50
The edge switches are configured as follows.
vlan 1
name "DEFAULT_VLAN"
untagged 49-50
ip address 10.8.0.3 255.255.255.192
no untagged 1-48
exit
vlan 100
name "Data"
untagged 1-48
tagged 49-50
exit
vlan 101
name "Voice"
tagged 1-50
voice
exit
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тАО10-13-2008 06:56 AM
тАО10-13-2008 06:56 AM
Re: DHCP, VLAN, VOIP Phones
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тАО10-13-2008 07:08 AM
тАО10-13-2008 07:08 AM
Re: DHCP, VLAN, VOIP Phones
Edge 1 - port 50 to core port 1
Edge 2 - port 50 to core port 2
Edge 3 - port 50 to core port 7
Am awaiting tech support from 3rd line to get back regarding dropping of the DHCP broadcasts... Gits :)
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тАО10-13-2008 07:12 AM
тАО10-13-2008 07:12 AM
Re: DHCP, VLAN, VOIP Phones
as for me trouble point to point bridge
cann't cary dhcp packet this device
whic manufacturer this device