Routing

[deepa.muralidharan]

Please check the attachment!

I have a central central with connectivity over IPLC circuits to two other office locatoins.

Location Y : Has a 5 E1 links to CO & is connected to Location X over 2 6Mbps MAN link. EIGRP is the routing protocol in use.

Location X : It has two routers, 4 E1 links on each router connecting to CO. EIGRP in use.

CO : Has connectivity to other location on MPLS - EIGRP & BGP are in use on this router at CO

Now, we have acquired a new link - POint to point -1DS3 on Router1 in Location X connected to CO. What should be the routing protocol that can be used? I need to have the DS3 link as the primary link & the 8 E1 links to be as backup.

If I configure EIGRP on the link, All the traffic via location Y to CO will traverse like : Location Y -- via MAN links --> Loaction X -- via DS3 --> CO.

I do not want this to happen.

How do I acheive this ?

What would happen if I configure BGP on the DS3 link ? This way, it'll take care of my 1st requirement, i.e, All the traffic would get routed via DS3 & the 8 E1 links will be in use only when the DS3 goes down. Is that right?

Please help!

[deepa.muralidharan]

Location z : One switch & two routers.

Switch providing LAN connectivity & router-1 to Location x core switch & router-2 to location y core switch. EIGRP is the routing protocol.

Location x : one core switch & two routers. Router 1 & 2 have connectivity to CO via 8 E1 links & router 1 has a ds3 connection to CO. Core switch connected to Location Y switch over 6 Mb X 2 links & connected to location z via a 4Mb link.EIGRP in use.

Location Y : One core switch & two routers. core switch connected to location z [4Mb link] & connected to location Y [6Mb X 2].

CO connected as said.

CO is also connected to other locations via MPLS - BGP.

[deepa.muralidharan]

Subnet details across locations!

Ex : 10.136.x.x --> Location X

10.128.x.x --> Location Y

10.138.x.x --> Location Z

10.5.x.x --> CO

Also, at each location we have separate subnets for data, voice, printer VLANs

EX:For Location X

10.136.1.x-10.136.5.x(255.255.255.0)--> Data

10.136.20.x-10.136.25.x(255.255.255.0) --> voice

& so on...

[Marwan ALshawi]

read it carefully and apply, test it and tell

[deepa.muralidharan]

Thank you!

I'll get back to you with the results tomorrow.

[Marwan ALshawi]

is it working or not ?

[deepa.muralidharan]

I've tried this & looks like it works.

Thank you!

[Marwan ALshawi]

if its worked

please, rate the helpful post

and good luck

[Giuseppe Larosa]

Hello Deepa,

you can achieve what you want with EIGRP by manipulating EIGRP metrics on the MAN links between location Y and location Z

take a sh int of interface connecting to MAN and increase the delay (delay is expressed in tens of microseconds)

Do it on both sides location Y / location X and the MAN link will become just a backup link as you desire.

int fas0/0

delay

changing delay is the best way because EIGRP is cumulative on delay while it takes the inverse of the lowest BW on the path

Hope to help

Giuseppe

[sdoremus33]

I agree with Giuseppe in order to accomplish your task at hand is to manipulate EIGRP metrics

[deepa.muralidharan]

I will definitely try this one too.

Thanks!