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Examples: Configuring Channelized DS3-to-DS0 Interfaces

The following configuration is sufficient to get the channelized DS3-to-DS0 interface up and running. The T3 interface can be divided into 28 channels, each at T1 line rate. DS3 channels can use the following encapsulation types for their logical interfaces:

  • PPP, PPP CCC, and PPP TCC
  • Frame Relay, Frame Relay CCC, and Frame Relay TCC
  • Cisco HDLC, Cisco HDLC CCC, and Cisco HDLC TCC

For more information, see Configuring Frame Relay DLCIs.

Note: All these configuration examples specify channel group 0 in the interface address, which is required for configuring the t3-options and t1-options statements.

Configuring Cisco HDLC Encapsulation on a Channelized DS3-to-DS0 Interface

[edit interfaces]ds-2/0/1:20:0 {encapsulation cisco-hdlc;unit 0 {family inet {address 10.0.4.40/32 {destination 10.0.4.41;}}}}[edit chassis]fpc 2 {pic 0 {ct3 {port 1 {t1 20 {channel-group 0 timeslots 1-5;}}}}}

Configuring PPP Encapsulation on a Channelized DS3-to-DS0 Interface

[edit interfaces]ds-2/0/1:20:0 {encapsulation ppp;unit 0 {family inet {address 10.0.4.40/32 {destination 10.0.4.41;}}}}[edit chassis]fpc 2 {pic 0 {ct3 {port 1 {t1 20 {channel-group 0 timeslots 1-5;}}}}}

Configuring Three Frame Relay DLCIs on a Channelized DS3 Interface

[edit interfaces]t1-5/1/3:0 {mtu 9192;encapsulation frame-relay;unit 1 {dlci 101;family inet {mtu 9000;address 10.123.1.2/32 {destination 10.123.1.1;}}family iso {mtu 9000;}family mpls {mtu 9000;}}unit 2 {dlci 102;family inet {mtu 9000;address 10.123.1.4/32 {destination 10.123.1.3;}}family iso {mtu 9000;}family mpls {mtu 9000;}}unit 3 {dlci 103;family inet {mtu 9000;address 10.123.1.6/32 {destination 10.123.1.5;}}family iso {mtu 9000;}family mpls {mtu 9000;}}}

Configuring Cisco HDLC Encapsulation with Byte-Encoding

[edit interfaces ds-0/1/0:5:0] no-keepalives;encapsulation cisco-hdlc;ds0-options {byte-encoding nx56;}unit 0 {family inet {address 10.221.2.8/24;}}

Configuring Cisco HDLC Encapsulation with Byte-Encoding and Framing

[edit interfaces ds-0/1/0:5:0] no-keepalives;encapsulation cisco-hdlc;t1-options {byte-encoding nx56;framing sf;}unit 0 {family inet {address 10.221.2.8/24;}}

Use Time Slots 1 Through 10

[edit chassis fpc slot-number pic pic-number ct3 port port-number t1 link-number]channel-group group-number;timeslots 1-10;

Use Time Slots 1 Through 5, 10, and 24

[edit chassis fpc slot-number pic pic-number ct3 port port-number t1 link-number]channel-group group-number;timeslots 1-5,10,24;

Published: 2010-04-20

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