Solved: Re: Routing performance of C9200L-24T

ngkin2010 · ‎01-09-2020

Hello all,

I am planing to enable "ip routing" on C9200L with network essential license. I would like to find our the max. layer 3 throughput that supported by C9200L-24T.

According to the data sheet, I have read the "stacking bandwidth" - 80Gbps, but I am not sure if it's also describing the layer 3 throughput (e.g. inter-vlan routing could utilize 80Gbps throughput?).

Grateful if anyone could help, thanks.

Joseph W. Doherty · ‎01-11-2020

Generally, Cisco's L3 switches L3 forwarding performance is the same as it's L2 performance.

For non-stacking, your 9200L has 24 Gig ports, and up to 4 10g ports, or a maximum of 64 Gbps. For wirespeed, this requires a fabric bandwidth of 128 Gbps and a Mpps of about 96 Mpps.

For stacking, it's unclear what the StackWise-160 provides or how it works. (For example, much of the original 3750's StackWise Cisco only explained with the release of the 3750E's StackWisePlus.)

View solution in original post

Leo Laohoo · ‎01-09-2020

And what routing protocols are you planning to use?

ngkin2010 · ‎01-10-2020

Hi Leo,

Thanks for your reply!!

I am planning to run few static routes only on the C9200. No dynamic protocol will used.

ngkin2010 · ‎01-10-2020

Hello,

I have find information to my question. Shared in this post if someone have the same question on it.

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9200-series-switches/nb-06-cat9200-ser-data-sheet-cte-en.html

Description	Switching capacity	Switch capacity with Stacking	Forwarding rate	Forwarding rate with Stacking
C9200-24T	128 Gbps	288 Gbps	95.23 Mpps	214 Mpps

*Measured with 64 byte packets

Taking into account with the worst scenario (all Ethernet packet having size of 64 Byte + 20 Byte Ethernet overhead = 80 Bytes):

The forwarding rate without staking would be ( 95.23 * 10^6 ) pps * ( 84 * 8 ) bits = 63.99 Gbps

The forwarding rate with staking would be ( 214 * 10^6 ) pps * ( 84 * 8 ) bits = 143.81 Gbps

Reference: https://community.cisco.com/t5/networking-documents/performance-throughput-of-a-switch-mpps/ta-p/3117301

Joseph W. Doherty · ‎01-11-2020

Generally, Cisco's L3 switches L3 forwarding performance is the same as it's L2 performance.

For non-stacking, your 9200L has 24 Gig ports, and up to 4 10g ports, or a maximum of 64 Gbps. For wirespeed, this requires a fabric bandwidth of 128 Gbps and a Mpps of about 96 Mpps.

For stacking, it's unclear what the StackWise-160 provides or how it works. (For example, much of the original 3750's StackWise Cisco only explained with the release of the 3750E's StackWisePlus.)

ngkin2010 · ‎01-12-2020

Hi Joseph,

Thanks for your reply. :)