7 Equal cost paths in ospf

dinesh_ymca · ‎02-25-2003

Hi.we are using ospf and have 6 equal cost paths between two sites.Now we are coming up with 7th IPLC,now how to support this 7th IPLC.

i cannot use multilink caz if one link of a mullink bundle fails i have to take full multilink out of production.

I cannot use two routers as if one router has 4 E1`s and other has 3 E1`s and 3 out of 4 E1`s fail on a router then only one E1 will have to bear the 50% load,

Can anyone suggest a good solution for my problem

regards

dinesh

thisisshanky · ‎02-25-2003

Dinesh,

Your question didnt come through...

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

thisisshanky · ‎02-25-2003

Why not group them into multilink bundles of group 2,2 and 3, so that even if one of the links of any bundle goes down, you still have 2 remaining groups available. Now for OSPF, there will be only 3 routes available for equal cost load balancing.

Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus

dinesh_ymca · ‎02-25-2003

Hi shanky.

well we are using IPLC`s and we are paying for each IPLC.Now suppose we have bundled 2 IPLC`s into one multilink bundle,if only 1 of these 2 is down or fluctuating we have to take whole multilink bundle out of production.we r running OSPF and VOIP,so cannot bear any fluctuations.Moreover the bundle that will have 3 E1`s if in that one E1 fails we will loose other two also.

so it is not feasible in our network.

hope i m clear.

plz suggest

regards

dinesh

y.ujjainwala · ‎02-27-2003

Hi dinesh

one clarification needed why do you have to take the whole multilink bundle out of production when one E1 fails?

what i would suggest is that there is very high probabbility of the E1 increasing in future so go in for a HSSI, connect all E1 to a black box ( for eg Nortel passport) and give the multiplexed o/p to the HSSI.

rgds

brucedavis · ‎02-27-2003

I may be way off here, but if a link goes down , wouldn't the new link state DB reassess equal paths with only the usable links?

Bruce Davis, CCNA since 2003

ruwhite · ‎02-28-2003

Late code can support up to 8 parallel links, using cef for load sharing, if this is any help.

Russ

dinesh_ymca · ‎02-28-2003

Hi.

well if one E1 of the Multilink Bundle is fluctuating,then it will effect the whole Multilink bundle,as our is a VOIP network we cannot allow fluctuations as it causes voice issues.

Russ please tell me how can i support 8 links on load balancing using cef.

regads

Dinesh