Configuring a channelized DS3 port

Figure 1 shows the logic of the DS3 port configuration.

Figure 1. Channelized DS3 port structure

The following shows the steps to configure a channelized port on a 12-port DS3 MDA:

A:ALA-A>config# port 7/1/1
A:ALA-A>config>port# tdm

To set the channelized mode on a port, the DS3 parameter must be in a shutdown state. Clear channel uses out-of-band signaling, not in-band signaling, so the channel's entire bit rate is available. Channelized ports use in-band signaling and must be explicitly enabled as shown:

A:ALA-A>config>port>tdm# ds3
A:ALA-A>config>port>tdm>ds3# shutdown
A:ALA-A>config>port>tdm>ds3# channelized ds1
A:ALA-A>config>port>tdm>ds3# no shutdown
A:ALA-A>config>port>tdm>ds3# exit

In the DS1 context, configure DS0 channel groups parameters. 24 timeslots can be configured per channel group as shown:

A:ALA-A>config>port>tdm# ds1 1
A:ALA-A>config>port>tdm>ds1# no shutdown
A:ALA-A>config>port>tdm>ds1# channel-group 1
A:ALA-A>config>port>tdm>ds1>channel-group# timeslots 1
A:ALA-A>config>port>tdm>ds1>channel-group# encap-type frame-relay 
A:ALA-A>config>port>tdm>ds1>channel-group# no shutdown
A:ALA-A>config>port>tdm>ds1>channel-group# exit
A:ALA-A>config>port>tdm>ds1# channel-group 2
A:ALA-A>config>port>tdm>ds1>channel-group# timeslots 2-10
A:ALA-A>config>port>tdm>ds1>channel-group# no shutdown
A:ALA-A>config>port>tdm>ds1>channel-group# exit
A:ALA-A>config>port>tdm>ds1# exit
A:ALA-A>config>port>tdm# ds1 2
A:ALA-A>config>port>tdm>ds1# channel-group 1
A:ALA-A>config>port>tdm>ds1>channel-group# timeslots 1
A:ALA-A>config>port>tdm>ds1>channel-group# exit
A:ALA-A>config>port>tdm>ds1# no shutdown
A:ALA-A>config>port>tdm>ds1# channel-group 2
A:ALA-A>config>port>tdm>ds1>channel-group# timeslots 2
A:ALA-A>config>port>tdm>ds1>channel-group# exit
A:ALA-A>config>port>tdm>ds1# no shutdown

The following output shows the channelized mode configuration:

A:ALA-A>config>port># info
----------------------------------------------
        tdm
            ds3 ds3
                channelized ds1
                no shutdown
            exit
            ds1 ds1-1
                channel-group 1
                    encap-type frame-relay
                    timeslots 1
                    frame-relay
                    exit
                    no shutdown
                exit
                channel-group 2
                    shutdown
                    timeslots 2-10
                exit
                no shutdown
            exit
            ds1 ds1-2
                channel-group 1
                    shutdown
                    timeslots 1
                exit
                channel-group 2
                    timeslots 2
                    no shutdown
                exit
                no shutdown
            exit
        exit
        no shutdown
----------------------------------------------
A:ALA-A>config>port#

Services can be applied to the configured channelized ports. The following example shows the CLI usage to configure a customer IES service with interface SAPs on the channelized ports. See the 7450 ESS, 7750 SR, 7950 XRS, and VSR Services Overview Guide for information about how to configure services.

A:ALA-A>config>service# ies 103 customer 1 create
A:ALA-A>config>service>ies$ interface test1 create
A:ALA-A>config>service>ies>if$ address 192.168.1.1/24
A:ALA-A>config>service>ies>if# sap 7/1/1.1.2 create
A:ALA-A>config>service>ies>if>sap$ exit
A:ALA-A>config>service>ies>if# no shutdown
A:ALA-A>config>service>ies>if# exit
A:ALA-A>config>service>ies# interface test2 create
A:ALA-A>config>service>ies>if$ address 192.168.2.1/24
A:ALA-A>config>service>ies>if$ sap 7/1/1.2.1 create
A:ALA-A>config>service>ies>if>sap$ exit
A:ALA-A>config>service>ies>if# no shutdown
A:ALA-A>config>service>ies>if# exit
A:ALA-A>config>service>ies>if# 

The following output shows the channelized ports (7/1/1.1.1 and 7/1/1.1.2) applied to SAPs on the IES service configuration:

A:ALA-A>config>service>ies# info
----------------------------------------------
...
        ies 103 customer 1 vpn 103 create
            interface "test2" create
                address 192.168.2.1/24
                sap 7/1/1.2.1 create
                exit
            exit
            interface "test1" create
                address 192.168.1.1/24
                sap 7/1/1.1.2 create
                exit
            exit
            no shutdown
        exit
...
----------------------------------------------
A:ALA-A>config>service>ies#