How can i share a single 3560 poe, between 4 routers.

[Duwaine Winder]

I am building out a voice lab, and looking to maximize the excess ports on a 3560 poe to all sites (HQ, BR1, BR2 and PSTN). I have tried a pvlan configuration but it doesn't work as expected (or maybe i'm doing something wrong).  Additionally I need to source dhcp from multiple places to each pvlan.

Any suggestions or shared configurations would be appreciated.

[Reza Sharifi]

Are you trying to put all 4 routers in the same vlan or 4 different vlans.

If it is the same vlan just connect each router to a port on the 3560 and put all the ports in the same vlan/subnet and give each router an IP address:

on the 3560

config t

vlan 100

name mgmt-vlan

exit

interface vlan 100

ip address 10.10.10.1 255.255.255.0

no sh

interface gi0/1

description port-to-HQ-router

switchport

switchport mode access

switchport access vlan 100

do the same for other 3 ports

assign an IP address to HQ router port that connects to port gi0/1 on the switch

config t

interface x/x

ip address 10.10.10.2 255.255.255.0

HTH

[Duwaine Winder]

4 different vlans, each serving dhcp to clients assigned to vlan

[Reza Sharifi]

if 4 different vlans than you need 4 ip segments with 4 vlans

example:

QH router 10.10.10.0/24 vlan 100

BR1 router 10.10.11.0/24 vlan 101

BR1 router 10.10.12.0/24 vlan 102

PSTN router 10.10.13.0/24 vlan 103

You also need to create layer-2 and layer-3 for all the vlans on the 3560 and put the each port in a different vlan and create 4 SVIs (one per vlan)

example

vlan 100

name HQ-vlan

exit

interface vlan 100

ip address 10.10.10.1 255.255.255.0

no sh

vlan 101

name BR1-vlan

exit

interface vlan 101

ip address 10.10.11.1 255.255.255.0

no sh

and so on

also turn on "ip routing" on the 3560.

HTH