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GRE TUNNELS ON 2921

Hi cisco kids,

can somebody please tell me  what is a maximum number of configurable gre tunnel interfaces on CISCO2921-HSEC+/K9 router?

  • WAN Routing and Switching
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2 REPLIES
Hall of Fame Super Silver

Re: GRE TUNNELS ON 2921

Hello Adis,

the limit in the number of GRE tunnels come from the limits of the IDB table the database that contain all the interface objects.

see this document about IDB limit

http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_tech_note09186a0080094322.shtml

Table 5 provide limit for C2921 in 1400 interfaces (including all physical interfaces, loopbacks and tunnel interfaces)

I would say 100 GRE Tunnels may be a practical limit.

Hope to help

Giuseppe

New Member

Re: GRE TUNNELS ON 2921

Thanks for the post.

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