Cisco C9300-24P WAN Link Throughput

[aditya@network-ie.com]

Hi,

Please assist, how much WAN Throughput does Cisco C9300-24P support if we terminate a 1G ISP link on the L3 Switch, having Network Advantage License on it?

IOS running:  Gibraltar-16.12.3

Regards,

Aditya Deshmukh

[Reza Sharifi · Accepted solution]

Hi,

Peering with an ISP with a Gig connection should not be an issue. Table-8 in this link shows the switching capacity.

https://www.cisco.com/c/en/us/products/collateral/switches/catalyst-9300-series-switches/nb-06-cat9300-ser-data-sheet-cte-en.html

HTH

[Joseph W. Doherty · Accepted solution]

In theory, you should be able to obtain full port speed on this switch model, but as you mention "WAN" throughput (for example, if unfamiliar with the issues of LFNs [long fat networks], you may want to research that subject a bit), and it being an ISP link, both of the latter often have issues that will keep your from obtaining a gig of throughput. Further, the switch may have insufficient buffers to deal with TCP's BDP (bandwidth delay product [also if unfamiliar with subject, you might want to research it too]) needed to allow TCP flows to obtain gig throughput.

I don't recall (?) switch licenses having performance caps (as do some of Cisco's routers).

[aditya@network-ie.com]

Yes, Tested successfully the throughput of 1Gbps.

Have a question in regards to NAT support on Cisco 9300 switch. Can we use it for 1000 Users network scenario and enable NATing on this switch. I have checked the below link:

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst9300/software/release/16-10/configuration_guide/ip/b_1610_ip_9300_cg/configuring_nat.html#id_109552

The maximum number of sessions that can be translated and forwarded in the hardware in an ideal setting is limited to 2500

Please assist.

[Reza Sharifi]

Yes, Tested successfully the throughput of 1Gbps.

Good to know.

Regarding your NAT question, first, we need to know if the 9300 for sure support NAT, as I have seen contradicting information about it here on the forum and traditionally catalyst edge switches (3650, 3750x, 3850, etc.) do not support NAT. Also, have a look at this link, as it appears that only the 9500 and 9600 support NAT and I think I have seen cases where you can configure NAT on the 9300 series but it does not work, which means it is not supported.

https://www.cisco.com/c/dam/en/us/products/collateral/switches/catalyst-9000/nb-06-cat-9k-faq-cte-en.pdf

HTH