AVAYA VLANS & Trunking

[backbone@vsnl.com]

Dear Michael
I have stucked up in one simple configuration details as below
I have 4 floors & each floor have 2 Switches

GND & Fourth - 4926 GTS & 3549GTS+PWR
I have my uplink from core switch (DAX) on Port No 25 of 4926 GTS

First/Second/Third :3549GTS+3549GTS+PWR => Stacked

I need to configure one VLAN on each floor
GND -41 (all Ports in Both switches in same VLAN)
1 - 42 (all Ports in Both switches in same VLAN)
2-43 (all Ports in Both switches in same VLAN)
3-44 (all Ports in Both switches in same VLAN)
4-45  (all Ports in Both switches in same VLAN)

& need communication between these switches whicha re connected to DAX Core switch

I have configured all the VLANs in all switches as per the instructions given by you in

blog.michaelfmcnamara.com/2011/01/802-1q-vlan-tagging-on-an-ethernet-routing-switch/

My configuration for 4926 at GND floor is as follows


vlan create 41-45 type port cist
vlan name 41 "nbgnd"
vlan name 42 "nb1st"
vlan name 43 "nb2nd"
vlan name 44 "nb3rd"
vlan name 45 "nb4th"
vlan ports 20-26 tagging tagAll
vlan configcontrol flexible
vlan members 1 NONE
vlan members 41 ALL
vlan members 42-45 20-26
vlan ports 1-19 pvid 41
vlan configcontrol automatic
!

interface vlan 41
ip address 192.168.41.254 255.255.255.0 2
interface vlan 42
ip address 192.168.42.254 255.255.255.0 3
interface vlan 43
ip address 192.168.43.254 255.255.255.0 4
interface vlan 44
ip address 192.168.44.254 255.255.255.0 5
interface vlan 45
ip address 192.168.45.254 255.255.255.0 6
exit

ip route 0.0.0.0 0.0.0.0 192.168.100.1 1 (100.1 is My Core)

mlt 1 name "mlt_to_1st" enable member 20-24
mlt 1 loadbalance advance

now my problem is I am not able to access the internet on all the floors, I can able to access internet simultainously only on two floors & on ports 23 & 24 only, I am not able to connect on Port No. 20-22

Plesase Help me with configuration

[TankII]

Your uplink (*to* the 4926)  ports need to be changed to changed to 'tagall' on the end user switches then the other VLANS assigned to the port.  This presents all VLANS available on the 'Core' 4926 to both ends of a link.

Since you have four floors, each with a separate link, you do not use an MLT.  MLT is for a trunk between two devices, not four devices connecting into one.  A single tagall port on each user switch and the four existing ports individually being tagged already on the 4926 takes care of the layer-2 communications.

The ports 20-26 on the 4926 are already set for tagall, that's good.  The uplinks on the other floors need to be set that way as well.

Don't forget your core (100.1) needs to have routes pointing backwards to the five networks on the 4926.

TankII

[backbone@vsnl.com]

Thanks TankII,

Will try it today & get back with the results

[backbone@vsnl.com]

hi, TankII

I tried disabling the MLT but its not working

My toplogy is as follows

From Core Switch to 4926 on port 25 (Fiber Uplink)
From 4950 Uplink to 1st , 2nd , 3rd & 4th (Port 2-22-23-24), also to 3950 pwr on gnd floor port 20

GND floor - VLAN 41
1 St floor VLAN 42 (Port no 1/48 uplink from GND 4926 port 24)
2nd floor VLAN 43 (Port no 1/48 uplink from GND 4926 port 24)
3RD Floor VLAN 44 (Port no 1/48 uplink from GND 4926 port 24)
4th Floor VLAN 45 (Port no 1/48 uplink from GND 4926 port 24)

[MatzeKS]

Hi, assumed that all interconnects between all Avaya Nodes are set to "tagAll" and all needed vlans are assigned to these.
I missed the "ip routing" option in your config.

good luck

[cielo]

First of all: upload a sketch of your physical topology, including port numbers.
2nd - the uplinks between access switch and Core (ERS 4900) should be configured with "tagAll", so the link between access and core is always adding 802.1Q tags headers, only if you are planning to add in the future other VLANs on the access layer - if this is not the case then do not tag traffic on uplink and don't create VLANs on the access switches; just create those VLANs on ERS4900 and use the PVID config per each uplink port
3rd: never split an MLT between more then two switches/stacks - the MLT (the equivalent of the EtherChannel on Cisco or NIC Teaming on servers world) is used to bundle two or more links between two equipment.
4th: you need to activate inter VLAN routing on 4900 by issuing "ip routing" command