topic thanks for your response.What in Application Networking

MSS value on ACE SM

axfalk1 — Wed, 25 Mar 2015 21:27:21 GMT

Hi,

We're running ACE SM A5(3.1a) and were wondering if there's a command that would show the MSS value on the ACE?

Thanks.

Hi,If you have not configured

Kanwaljeet Singh — Wed, 25 Mar 2015 21:46:27 GMT

Hi,

If you have not configured connection parameter map and set it to some other value then it should be default which if i am not wrong(can be double checked from user guide) is 1460.

For a particular connection you can use a command:(not pasting full output)

show np X me-stats "-c <conn-id> -vvv"

NP number and connection detail can be obtained using "show connection" output.

ACE30-1/Admin# sh np 1 me-stats "-c 633710 -vvv"
Connection ID:seq: 633710[0x9ab6e].2
Other ConnID : 643599[0x9d20f].2
Proxy ConnID : 0[0x0].0
Next Q : 0[0x0]

20.20.20.1:21910 -> 20.20.20.2:2000 [RX-NextHop: TX] [TX-NextHop: CP]
Flags: PAT: No DynNAT: No Implicit PAT: No On_Reuse: No
L3 Protocol : IPv4 L4 Protocol : 6
Inbound Flag : 1
Interface Match : Yes
Interface MatchID: 8
EncapsID:ver : 1:0 TCP ACK delta : 0x0
MSS : 1460 TOS Stamp : 224
Repeat mode : No Punt Flag : No

This shall show you the both front end as well as backend leg of the connection.

You need to worry about MSS when ACE is doing L7 loadbalancing.

Regards,

Kanwal

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thanks for your response.What

axfalk1 — Wed, 25 Mar 2015 22:41:12 GMT

thanks for your response.

What specifically would we need to worry about MSS when ACE is doing L7 loadbalancing?

Thanks again.

Hi,well not worry but it is

Kanwaljeet Singh — Thu, 26 Mar 2015 21:45:58 GMT

Hi,

well not worry but it is seen that when front end and back end MSS in case of L7 LB is not same, performance issues show up. And it is recommended as well.

Regards,

Kanwal

Note: Please mark answers if they are helpful.