Switch and router

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1

Hello

There is big congestion between router and switch

I read some documents about flowcontral

Do I disable or adjust flowcontral at the same?

Can flowcontral solve the congestion issue?

How can I adjust flowcontral in cisco router and HP switch?

Thank you so much

2

Hi
Forget flow control, because you will use buffer and at the someone will not understant pause frame.
Another issue is : with pause frame you block all the traffic from the outbound port ... So very dangerous.
Best way : big pipe.

Regards

Fabien

Envoyé de mon iPad

3

Hello

Thank you for your help

But we can't increase the pipe as we are using 10G switch.

The congestion happens when the traffic is using 7G

Any idea?

In addition, how to determine the congestion happens in router or switch.

Thank you

4

Thank you for your help

But we can't increase the pipe as we are using 10G switch.

The congestion happens when the traffic is using 7G

Any idea?

In addition, how to determine the congestion happens in router or switch.

Different manufacturers and platforms have different ways of indicating the presence of congestion. Some will not explicitly report it, so you end up having to go back and look at performance statistics on your devices
(per-interface traffic, overall traffic and/or traffic per ASIC group, CPU/memory/buffer utilization, link errors, overruns, etc).

Whichever manufacturers you use will likely have lots of resources available through their websites/support channels for troubleshooting congestion.

I'm going to go out on a limb here and take a guess that Ann = Deric, using a different address?

jms

5

If you cannot increase bandwidth, then you must increase the TX queue (in QOS
and/or port buffer).

~Randy

6

"increase pipe" = port trunking/etherchannel/port bonding whatever your supplier calls it. just use 2 or 4 ports instead of just one.

ieee 802.3ad/lacp/link aggregation, etc.... all the same stuff. :wink:

provided you have another interface on/for your router ofcourse (your switch probably has plenty :wink:

also an option (for cisco)...

int gix/x/x
max-reserved-bandwidth 1

(i'd say, 1% of 10ge should about cover all the needs for inband layer-2 related stuff as a few kbit/s already should suffice :wink:

1% being the minimum you can set this to.

7

> Hello
>
> Thank you for your help
>
> But we can't increase the pipe as we are using 10G switch.
>
> The congestion happens when the traffic is using 7G

If you cannot increase bandwidth, then you must increase the TX queue
(in QOS and/or port buffer).

~Randy

Or the congestion could be further upstream or the flows might be high latency TCP and are being throttled because of the network latency. There could be any number of issues.