EOMPLS HUB AND SPOKE

Unanswered Question
Nov 10th, 2008

hello every buddy

can any please help me to solve the following problem:

i need to connect multiple vlan site to a hub vlan using xconnect EOMPLS i mean

VLAN 1

VLAN 2

VLAN X ====== EOMPLS VLAN 3

VLAN 4

all the vlan speak to the same VLAN X

without VPLS or it should be VPLS

i mean i need multible xconnect under the same VLAN X

thanks

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mheusing Tue, 11/11/2008 - 05:40

Hi,

VLANoMPLS is basically a point to point solution. Looking at it at the ethernet frame level: it is an instruction for a LSR to send all dot1q frames of a certain VLAN to another LSR.

Thus you cannot setup your required Hub and Spoke solution with VLANoMPLS/EoMPLS because you can only send a dot1q frame arriving in VLAN X to ONE other LSR. This solution also does not include learning of MAC addresses, which could be used to sort frames to different VCs.

So you either could use a VPLS solution - which might be a bit of an overkill - or you could setup VLANoMPLS to a trunk from the LSR out to a router/switch and interconnect the VLANs there. It really depends on the connectivity requirements you have. Why do you need layer2 hub and spoke connectivity? Which underlying issue prevents any-to-any being a candidate?

Regards,

Martin

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