topic Re: 3 E1 in PPP MultiLink do not use full bandwidth available in Routing and SD-WAN

3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Mon, 04 Mar 2019 01:31:50 GMT

When copying a 2GB file on a Multilink that has 5942 Kb available only uses 1.5Kb

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

paolo bevilacqua — Wed, 20 Jun 2007 18:08:11 GMT

Hello,

Can you try "ppp multilink fragment size 500" ?

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Thu, 21 Jun 2007 19:53:24 GMT

The IOS of the router on the other end does not support this change. I am in the process of upgrading that IOS to the latest version

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

paolo bevilacqua — Thu, 21 Jun 2007 20:21:04 GMT

Good luck and let us know if it works.

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Fri, 06 Jul 2007 19:48:25 GMT

Did not work, very small improvement to 1.14 Mb during a 2GB file copy.

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

paolo bevilacqua — Fri, 06 Jul 2007 19:51:32 GMT

Has the router config changed ? What is the config of the router on the side that has the file being transmitted ?

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Fri, 06 Jul 2007 19:57:07 GMT

See attached

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Fri, 06 Jul 2007 19:57:54 GMT

No option under latest version

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

paolo bevilacqua — Fri, 06 Jul 2007 21:05:41 GMT

Hi,

I do not see "ppp multilink fragment size 500" under any interface, where di you configure it ?

Also, would you send "show controllers e1" to rule out any physical problem. It appears the vwic modules have not been but in clocking domain as required.

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Mon, 09 Jul 2007 12:36:07 GMT

There is no option under the latest IOS to change the fragment size. Please see attached.

In regards to the clock. Cisco said there is no need for "network-clock participate" but I am willing to try it.

Mary

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

paolo bevilacqua — Mon, 09 Jul 2007 12:54:45 GMT

Hi,

Your E1 lines are clean, there is no need for "network-clock-participate".

Now, what IOS are you using? Please include "show version".

"ppp multilink fragment size" is available on from 12.2(4)T onwards. With previous releases, you can only configure the "ppp multlink framgment delay" in order to indirectly set the fragments size.

Also please include "show interface", "show buffers".

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

vinay_verma80 — Tue, 10 Jul 2007 12:24:47 GMT

use 2/3 ftp server(on diffrent machine) and again try to download on diffrent maching and find the collective b.w

u will get the result

regards

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

paolo bevilacqua — Tue, 10 Jul 2007 12:37:31 GMT

Hi,

the thing is that multilink PPP is supposed to make available the full bandwidth to a single session.

Else you would be using regular load sharing without the need for MLPPP.

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Tue, 10 Jul 2007 19:21:30 GMT

I did send you this, right?

Did you find anything?

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

paolo bevilacqua — Tue, 10 Jul 2007 19:52:43 GMT

Hi,

No, I didn't saw "show version", or "show interface" on both routers. My suspicion is that the fragment is not set small enough.

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Tue, 10 Jul 2007 20:04:00 GMT

Ok here it is.

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Tue, 10 Jul 2007 20:08:55 GMT

Sorry, wrong files. Let's try again.

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

paolo bevilacqua — Tue, 10 Jul 2007 20:29:22 GMT

Hi,

the bundle members are balancing quite well and the input error ratio is reasonable.

The thing is that you cannot set the fragment size directly because you have upgraded to 12.4 mainline, not 12.4 T, where the command is supported starting from 12.4(4)T.

If you do not want to upgrade again, try setting "ppp multilink fragment delay 20"

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Wed, 11 Jul 2007 17:13:02 GMT

implemented "ppp multilink fragment delay 20" performing a test copy.....

Re: 3 E1 in PPP MultiLink do not use full bandwidth available

mzm — Wed, 11 Jul 2007 18:26:02 GMT

I implemented it on both routers. it has not made a difference. Do you want to see any files during the copy? it has been running for 1.5 hours.