asic on WS-X4920-GB-RJ45

[TheGreatDoc]

How can I view the asic groups?

I need to make few port channels on them and want to do it properly!

Thanks

[wintermute000]

if you can't find it in the official guides, then you'll have to ask your sales engineer/account rep. A lot of the time this info is not in the public domain.

Note there is an argument that putting all members of port channel in the same asic group is not the best method for redundancy.

[icecream-guy]

Typically the ports bunched together are in the same ASIC group.
so on that module, group of 10, space, then another group of 10 ports, presumably they'd be on difference ASIC's

maybe this helps?

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/46sg/configuration/guide/Wrapper-46SG/sw_int.html#wp1077316

[TheGreatDoc]

if you can't find it in the official guides, then you'll have to ask your sales engineer/account rep. A lot of the time this info is not in the public domain.

Note there is an argument that putting all members of port channel in the same asic group is not the best method for redundancy.

For that reason I want to know the ASICs groups

Typically the ports bunched together are in the same ASIC group.
so on that module, group of 10, space, then another group of 10 ports, presumably they'd be on difference ASIC's

maybe this helps?

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/46sg/configuration/guide/Wrapper-46SG/sw_int.html#wp1077316

No it doesnt. COMMAND NOT SUPPORTED is what I get

About the groups by 10, I know for example that in 2960G or 3750G they are group of 4 but I though a 10 group per asic is a lot of ports. I hope I dont get any bottleneck

Thanks by the way

[that1guy15]

I swear the commands used changes per platform or Cisco BU. Do some google searching and you will find a handfull to try pretty quick. The output is sometimes cryptic but you hopefully can stumble your way through it.

If its supper ciritcal you nail this down then put pressure on your Cisco SE to get you the information or commands to use. If they cant get it last ditch effort is call tac and hope for a nice guy.

[Dieselboy]

It's for threads like this that I love coming here.

How would you know if your asic is being a bottleneck? Overrun frames incrementing counters?

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/command/reference/3750xcr/cli2.html

[that1guy15]

It's for threads like this that I love coming here.

How would you know if your asic is being a bottleneck? Overrun frames incrementing counters?

http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3750x_3560x/software/release/12-2_55_se/command/reference/3750xcr/cli2.html

This is one of those TS scenarios that sucks balls. Cisco does not give good insight into this so it can be hard and very time consuming.

Usually it comes up as performance issues or general slowness across multiple devices.
1)I start with the interfaces and see if there are any standouts for packet loss runts, giants CRCs etc. Also check for queuing. This is assuming the cable and far end switch is ruled out.
2)Next I check for buffer misses. Solarwinds monitors them by default and its a good one to add to your NMS. Do they happen in burst? Maybe peak time or during backups.
3)Now its time to get the actual size and preformance of your buffers and ASIC. Might have to call TAC and do an NDA to get this info and they can help identify as well.
4)If Im still in doubt then I nail down which ASIC is being overloaded (should know by now) and try to get a packet capture off it for a couple mins hopefully during overload. Wireshark has a nice traffic graphing tool that will show if your actually exceeding the threshold you identified above. This is also the only way I know to identify micro-burst on an interface.

Thats the easy part. The hard part is sitting down with management and explaining why the $10K switch they just bought cant handle 10Gbps of traffic at once. Im looking at you Cat-3750, fuck you!!

I might be missing a step here or there but these are the big ones for me. Id love to hear what others use to TS this.

[icecream-guy]

the $10K switch they just bought cant handle 10Gbps of traffic at once. Im looking at you Cat-3750, fuck you!!

[TheGreatDoc]

The thing is the switch is in lab till next week or so. I was trying to do it well before production but seems I will have to set it up and "see the things coming" (Its a Spanish saying)