I have an old router that is in production, and has been working fine to the best of my knowledge, for a while. It was sent to me from corporate, and I am trying to document it as best I can. I went in and discovered some oddities with it, and was wondering what they meant. This is what the config is, in part:
controller T1 0/1/0
channel-group 0 timeslots 1-24
no ip address
ppp multilink group 1
ip address 184.108.40.206 255.255.255.252
ip load-sharing per-packet
My confusion comes from several things; the lack of any ppp commands on the serial interface; the :0 at the end of the serial interface number; and the use of the channel group time slots (does that mean its a channelized T1(PRI)?
Thank you so much! So, the channel-group - timeslots 1-24 bundles all of the channels into 1 group, addressable by adding the :) to the end of the interface number, correct?
And, the multilink interface and its subcommands have NO effect, because the serial interfaces have no encap ppp/ppp multilink/multilink group 1/ commands, is that correct? If i wanted to enable multilink on the three T1's, would this be all that is necassary?
It is interesting and inconsistent (based on what you have posted) to have the multilink configured on the router. It is odd (and makes me think that it is inactive) that the multilink has no ip address configured. From what you have posted I believe that the serial interface is using HDLC encapsulation and not ppp. If you post the output of show interface and show ppp multilink it could confirm this.
The :0 at the end of the serial interface number is an indicator that you are configuring the control channel of the T1 which is defined in controller T1 0/1/0. It uses the channel-group timeslots to indicate that this is a full T1 (not partial).
A show int confirms encap is default of HDLC, which also confirms the ppp multilink is no active.
What you say regarding the :0 has me slightly confused, I understood from Mohammed that because the channels were put in a group (group 0) that the :0 addressed that group? From what you are saying regarding it addressing the control channel, it should be :23, isn't that the D channel?
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