Cisco ASR9006 for internet boundary router -capacity concerns

[Eric Guo]

Hi all,

We are going to introduce full internet route table ( ipv4 and ipv6) into our global route table from  two different ISPs. Currently, we try to use ASR9006 device as our edge router, so we have concerns about this platform capacity as back plane/line card as we are planning to use dual  A9K-RSP-4G as RSP and  A9K-8T-L Trident line card.

So could someone please confirm this platform is good to support this design? or do we have something else  that need to consider as well ?

by the way, how to calculate routes/prefixes number with memory consumption of RSP and line card NP etc?

thanks,

Eric

[Aleksandar Vidakovic]

Hi Eric,

asr9k platform can surely handle it. The A9K-RSP-4G and A9K-8T-L are from the first generation of asr9k RSP and LC. These cards store up to 1.3 million FIB entries in HW (if you don't need more than 32k MAC addresses), depending on the configured profile. The FIB space is shared between IPv4 and IPv6. One IPv6 entry consumes as much space as 2 IPv4 entries.

Typhoon and RSP440 can store up to 4M FIB entries in HW (no dependency on MAC addresses, they use separate space).

Tomahawk and RSP880 can do the same today, but will be able to scale up to 10M FIB entries.

You can find all this information if you search for CiscoLive sessions BRKARC-2003 and BRKSPG-2904.

Hope this helps,

Aleksandar

[Eric Guo]

thanks Alexksander  for your information, much appreciated!