PPP multilink on Cisco877?

What would you multilink on a single-interface router? Perhaps that is why they took it out? (I'm sure they have to cut out quite a bit out of IOS on these little tiny routers).

It is a valid command on bigger routers. I couldn't tell you on an 877.

You may wish to investigate:

DETAILED STEPS

Step 3

Command or Action

interface multilink multilink-bundle-number Example: Router(config)# interface multilink1

Purpose

Creates a multilink bundle or enters multilink interface configuration mode.

The multilink-bundle-number argument is the number of the multilink bundle (a nonzero number).

Sincerely,

Brad Reese Cisco IOS Software - Compatible Partner Matrix by Technology

Hendersonville Road, Suite 17 Asheville, North Carolina USA 28803 USA & Canada: 877-549-2680 International: 828-277-7272 Fax: 775-254-3558 AIM: R2MGrant BradReese.Com - Global Cisco Systems Pre-Sales Support

Sure enough - doesn't work on an 877. c870-advsecurityk9-mz.124-9.T.bin

I have previously used I think

int dialer 1 encap ppp ppp mul

Says that mlppp is in both advanced-security and advanced-ip-services releases.

Here is an 837 that I had a quick look at. I just typed the commands in, I DID NOT get it working since I do not have an ISP that supoprts MLPPP.

c837-k9o3sy6-mz.124-8.bin

interface Multilink1 description test no ip address ppp multilink ppp multilink group 1

interface Dialer2 no ip address encapsulation ppp ppp multilink !

Very odd I say.

Thanks for the replies, I have been looking into this & playing around on a few test routers we have. It looks like it is an IOS 'feature'. Although the feature navigator says it is in the Advanced Security release, you can't configure a multilink interface. You can however go so far in configuring a dialer interface for MPPP:

Router(config-if)#ppp multilink group 1 % Cannot put ddr interface in multilink-group

In the Advanced IP Services release, there is no problem in configuring the multlilink interface, interleaving, etc. We have decided to pay the extra & go for the Advanced IP Services feature set for this requirement as a result.

As an aside, we also have one of the new Cisco SB107 routers in to test & while that supports the multilink we need, it is more limited in some of the QoS settings we would like to see (can't set dscp via policy- or route-maps it seems)

BTW - we need to configure multilink for the interleaving, to run voice over the link.

Thanks again.

You could run Frame-Relay instead off PPP if the options are not available on the router. We have over 90 VoIP sites on low speed connections running perfect quality voice with FR.

James