Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. If you'd prefer to explore, try our test area to get started. And see here for current known issues.

New Member

linking SUP720 with OSM

hello guys,

we want to implement a resiliency project in our network and we think that 7613 will be the ideal choice. it will be equiped with two SUP720-3BXL, two OSM-2+4GE-WAN+ and some optical line cards.

the devices will be positioned as a PE in our MPLS network replacing the existing 7206s.

we have two uplink ports and the first idea was to put them on the OSM modules.

but we find out very soon that the transportation network equipment doesn't support yet optical ports. we buy only optical line cards, so the only uplink option remains the supervisors. but someone attentioned to us that we could loose some of the existing functionality wich is now implemented.

we find out that it is possible to have a physical loop between the supervisor optical SFP port and the optical port from the OSM and do all the job on the OSM . did someone heard about this ?

what is the impact of a such implementation ?

we are a major ISP and we don't want to implement some nasty things in our network .


Re: linking SUP720 with OSM


what I do not understand right now is, what functionality regarding a MPLS PE you´d like to gain - or not loose - with the OSM modules?

The 7613 with the Sup720-3bxl will be well suited to operate as PE router even without OSM.

Besides that you could interconnect them. The main impact is - besides cost! - a more complicated setup than using the Sup720 alone with less performance. The uplinks are a bottleneck compared to the backplane capacity of the Sup720.

Hope this helps! Please rate all posts.

Regards, Martin

New Member

Re: linking SUP720 with OSM

hello mheusinger,

we have already in place for some locations 7600 with OSM modules and SUP-720-3BXL. we have implemented :

-PXF based EoMPLS (vlan based)





the uplink ports for those locations are the OSM modules .

the purpose of this project is to increase the resiliency on all the locations who doesn't have yet a 7600 and for this we thinking at :

-cisco 7613 chassis

-2 SUP720-3BXL

-2 OSM

-some DFC optical line cards

we want to separate the control plane from data plane and we want to implement also NSF/SSO and

graceful restart for BGP, IS-IS, LDP.

the idea is that for the moment the transportation network doesn't offers yet support for optical interfaces.

so the solution with the physical loop was one answer for our dilema.