cancel
Showing results for 
Search instead for 
Did you mean: 
cancel
4041
Views
0
Helpful
33
Replies

3 E1 in PPP MultiLink do not use full bandwidth available

mzm
Level 1
Level 1

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

33 Replies 33

hi

Thanks for ur remarks

But I still think that MLP fragments the packet by default to packet size / no of link

Quote from Cisco

IP Telephony Self-Study

Cisco QOS Exam Certification Guide,Second Edition by Wendell Odom, CCIE No. 1624

Michael J. Cavanaugh, CCIE No. 4516

chapter :Link Fragmentation and Interleaving (page:488)

MLP, by its very nature, fragments packets

MLP always fragments PPP frames to load balance traffic equitably and to avoid out-of-order

packets. Notice that the 1500-byte packet was fragmented into three 500-byte fragments, one for

each link. By default, MLP fragments each packet into equal-sized fragments, one for each link.

Suppose, for instance, that two links were active; the fragments would have been 750 bytes long. If

four were active, each fragment would have been 375 bytes long. And yes, even the 100-byte packet

would be fragmented, with one fragment being sent over each link.

The other point you should consider about basic MLP, before looking at MLP LFI configuration, is

that the multiple links appear as one link from a Layer 3 perspective. In the figures, R1 and R2 each

have one IP address that applies to all three links. To configure these details, most of the interface

subcommands normally entered on the physical interface are configured somewhere else, and then

applied to each physical interface that will comprise part of the same MLP bundle.

let me If I have make a mistake to understand the topic

regards

Right I know it should, but I don't think it is. Should I upgrade to 12.4T?

Vinay,

Thanks for sharing the source of your information. It may be very well correct. It appears logical that by default, fragmentation is made dividing packet size by number of links.

However in this case nothing seems to help and perhaps we are going around and around because of some reason that nobody yet has been able to identify.

jwdoherty
Level 1
Level 1

Possible client BDP issue? What type of clients are transfering the 2GB file and what's the latency between them?