Maximum count L3 Interface on C76XX

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Oct 18th, 2008
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Hi, i have С7604 (RSP720-3CXL) + WS-X6708-10GE-3CXL

IOS: c7600rsp72043-advipservices-mz.122-33.SRC1.bin

In this router terminate L2/L3 VPN & Internet access.

How many L3 interface i can create ?

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dkalashnikov Sun, 10/19/2008 - 04:16
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But i found:

· The Catalyst 6000 Series and Cisco 7600 with FlexWAN uses an architecture that assigns a hidden VLAN for each physical interface and logical subinterface. A maximum of 4096 VLANs limits the total number of subinterfaces to a theoretical maximum of 4096. The IDB limit on the Catalyst 6000 Series and Cisco 7600 is currently limited by the maximum number of IDBs supported, which is 3000.

Giuseppe Larosa Sun, 10/19/2008 - 05:09
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Hello Dmitry,

the IDB limit was the first thing I thought of but I was not sure if this concept applies to multilayer switches too.

I've seen it in action in MPLS TE testing on GSR and C7500 (it was a few years ago)

I just wander if a L2 only Vlan uses an IDB entry or not. It has an SNMP ifindex this is sure.

If it does you need to take care of this.

so you can think of 3000 interfaces and a maximum of 1024 VRFs.

Hope to help



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