ASR9K Netflow Capacity

[ar]

Hi.

Anyone knows the ASR9K netflow capacity?

I am thinking of this as replacement for 7600 as border routers with netflow enabled.

7600s has a limit of 250K flows and has issues on netflow tcam overflow.

I want to know if this limitation is resolved in ASR9K.

thanks

[dpothier]

hi Allan,

Please review Xander's ASR9K Netflow Architecture doc and see if that answers your questions:

https://supportforums.cisco.com/docs/DOC-27060

regards,

david

[ar]

Thanks.

7600 3BXL has 250K flows limit.

Are we saying, ASR9000 can handle upto 1M flow entries?

Sample usage

The memory used with the cache size of default 64k entries for ipv4 & MPLS is about 8MB & for ipv6 is about 11MB.

The memory used with the cache size of maximum 1M entries for ipv4 & MPLS is about 116 MB & for ipv6 is about 150MB.

Target IP address: 10.169.64.76
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 10.169.64.73
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.169.64.76, timeout is 2 seconds:
Packet sent with a source address of 10.169.64.73
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

[Nicolas Fevrier]

Hi Allan,

it's 1M "per line card". In the ASR9000, NF is handled at the line card level and not the RP level, consequently, you can reach this scale per line card and multiply it by your number of line cards.

Cheers,

N.

[ar]

Thanks.

is 1M flows the max limit or I can increase this by increasing the cache size per linecard?