A9K-36X10GE-TR vs A9K-24X10GE-TR - is the 36-port card oversubscribed?

[nesttech11]

We are trying to understand the difference between these 36-port and 24-ports cards.

Is the 36-port card considered to be oversubscribed as compared to the 24-port card?

Is is RSP dependent?

Any other details would be helpful.

Thank you.

[smilstea]

Neither card is oversubscribed, the only difference is the number of NPs and ports.

You can check the NP mapping with show controller np ports all loc <lc>.

With dual RSP440 you have 440Gbps/slot.

Thanks,

Sam

[nesttech11]

Sam,

In an ASR-9010 chassis, when DUAL RSP440's are used, one of them is considered "standby".

So even with one RSP440 set as "satndby", the 2 RSP's provide 440G per slot?

If a system is running DUAL RSP440's, does the 36X10G card offer the same performance as the 24X10G card?  Do all 36 ports have the same performance?

[smilstea · Accepted solution]

The fabric on the ASR9K (on the RSPs) runs in active/active, so both RSPs fabric are used at the same time.

The 24x10 card offers more NPs but fewer ports per NP, it is undersubscribed with 3 ports per NP, whereas the 36x10 card uses all the BW of the NP to support 6 ports per NP. So in terms of performance both cards should be able to handle linerate.

Thanks,

Sam