Procurve 2848 routing?

[Mark E Wilson]

We have two buildings connected via fibre. Each building has two Procurve 2848’s. Currently there are two Vlans set-up (one for each building), and everything seems to be working properly.

However, I would like to create a third Vlan in building #2. This Vlan would need to access all network resources in both buildings, but would have a separate internet connection. The two existing Vlans share a T1 connection (located in building #1), and I would like a third Vlan to use a cable connection located in building #2. I have an extra 2848 that could be used, but I would prefer not to use the additional switch.

Any suggestions on the “best” way to accomplish this would be greatly appreciated.

Building # 1 Switch:

cdp run
mirror-port 1
interface 38
no lacp
exit
interface 45
no lacp
exit
interface 46
no lacp
exit
trunk 45-46 Trk1 Trunk
ip default-gateway 192.168.1.1
ip routing
snmp-server community "public" Unrestricted
vlan 1
name "TFC"
untagged 1-44,47,Trk1
ip address 192.168.1.1 255.255.255.0
ip helper-address 192.168.1.22
tagged 48
ip proxy-arp
exit
vlan 2
name "CORP"
ip address 192.168.2.1 255.255.255.0
ip helper-address 192.168.1.22
tagged 48
ip proxy-arp
exit
interface 2-44,47-48
monitor
exit
fault-finder bad-driver sensitivity low
fault-finder bad-transceiver sensitivity low
fault-finder bad-cable sensitivity low
fault-finder too-long-cable sensitivity low
fault-finder over-bandwidth sensitivity low
fault-finder broadcast-storm sensitivity low
fault-finder loss-of-link sensitivity low
fault-finder duplex-mismatch-HDx sensitivity low
fault-finder duplex-mismatch-FDx sensitivity low
ip route 0.0.0.0 0.0.0.0 192.168.1.2
no stack
spanning-tree Trk1 priority 4
ip ssh version 1-or-2
password manager
password operator

TFC2848one# show ip rout

IP Route Entries

Destination Gateway VLAN Type Sub-Type Metric Dist.
------------------ --------------- ---- --------- ---------- ---------- -----
0.0.0.0/0 192.168.1.2 1 static 1 1
127.0.0.0/8 reject static 0 250
127.0.0.1/32 lo0 connected 0 0
192.168.1.0/24 TFC 1 connected 0 0
192.168.2.0/24 CORP 2 connected 0 0


building #2 switch:

cdp run
interface 17
speed-duplex 100-half
exit
interface 45
no lacp
exit
interface 46
no lacp
exit
trunk 45-46 Trk1 Trunk
ip default-gateway 192.168.2.1
snmp-server community "adex" Unrestricted
vlan 1
name "TFC"
ip address 192.168.1.3 255.255.255.0
tagged 48
no untagged 1-44,47,Trk1
exit
vlan 2
name "CORP"
untagged 1-44,47,Trk1
ip address 192.168.2.3 255.255.255.0
tagged 48
exit
no stack
spanning-tree Trk1 priority 4
ip ssh version 1-or-2
password manager
password operator

corp2848one# show ip route

IP Route Entries

Destination Gateway VLAN Type Sub-Type Metric Dist.
------------------ --------------- ---- --------- ---------- ---------- -----
0.0.0.0/0 192.168.2.1 2 static 0 250
127.0.0.0/8 reject static 0 250
127.0.0.1/32 lo0 connected 0 0
192.168.1.0/24 TFC 1 connected 0 0
192.168.2.0/24 CORP 2 connected 0

[Pieter 't Hart]

- create the third vlan
- tag the vlan on the ports that connect the two switches.
- DON't give the switch that does the routing an ip-adress in this vlan.
- untag a port in this vlan
- connect your separate internet router to this port
- untag ports for this vlan as necessary.

hth
Pieter