Junos OS

Hi all,

 Does MX series have any limitation on number of routing instance ? 

Hi Tu-fpt

The only place where I saw the limitations on the routing-instances was in the Advanced VPNs guide (training book)

It was said there that on M and T series in V5.6 ( ??? Quite very old I admit) you have to stay under 2000 VRF tables.

With less that 200 routes in each one (if you use OSPF)

Another combination given is 100 VRF with 1000 static routes in each.

The document wasn't more precise (If you folowed this training it's in the chapter Advanced VPN scaling L3 VPN) 

In fact it will depend a lot and on a lot of things:

- routing protocol used in the Routing-instance

- Number of routes in there

- Number of interfaces

- ...

I hope someone from Juniper could give you some more precise answer .

HTH

Thank Loup2 for quick response.

Actually I want to use no-forwarding instance to run RIP for each customer. This is reason I concern about limitation of routing instance.

The numbers of VRF, BGP and RIP adjacency scaling are different in JUNOS.

JUNOS supports up to 6000 routing-instances (or any/all types) in the MX series, however the this is (presumably) with static routing.

The max number of RIP adjacencies is 1000, while the max number of BGP peers is 4000.

Excuse me, Dan, what are RIP adjacencies ?

Hello Dan,

That`s a helpful answer, Where dou you obtain the info? I need a support of this info for a customer who`s buying a MX240.

Thanks a lot

Do you know what the limit would be for OSPF? Here is the requirement: The scenario is  10G to Amazon Direct Connect and a 10G to an existing Cisco 6500. They are looking for is a smallish MX router that can do 100+ or 1000+ routing instances?  The instances will only have a few (5-10 tops, maybe?) in each instance…so small per instance.  Just lots of instances. All these routes and instances will need to be advertised to the 6500 via OSPF (or maybe BGP).  What would be a good MX configuration to do this?