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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
OL-14127-08
Chapter 16 Configuring the 2-Port and 4-Port Channelized T3 SPAs
Configuration Tasks
Verifying Encapsulation
Use the show interfaces serial command to display the encapsulation method:
Router# show interfaces serial2/0/0
Serial3/0/0 is down, line protocol is down
Hardware is SPA-2XCT3/DS0
MTU 4470 bytes, BW 44210 Kbit, DLY 200 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, crc 16, loopback not set
Keepalive set (10 sec)
Last input never, output never, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts (0 IP multicast)
0 runts, 0 giants, 0 throttles 0 parity
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 applique, 2 interface resets
0 output buffer failures, 0 output buffers swapped out
1 carrier transitions alarm present
DSU mode 0, bandwidth 44210 Kbit, scramble 0, VC 0
Channelized
Router(config)# interface serial
slot/subslot/port/t1-number:channel-group
Unchannelized
Router(config)# interface serial slot/subslot/port
Selects the interface to configure and enters
interface configuration mode.
• Channelized:
slot/subslot/port/t1-number:channel-group—
Specifies the location of the interface. See also
the
“Specifying the Interface Address on a
SPA” section on page 16-7.
• Unchannelized:
slot/subslot/port—Specifies the location of the
interface. See also the
“Specifying the
Interface Address on a SPA” section on
page 16-7.
Router(config-if)# encapsulation
encapsulation-type {hdlc | ppp | frame-relay}
Sets the encapsulation type on the interface:
• hdlc—High-Level Data Link Control (HDLC)
protocol for serial interface. This
encapsulation method provides the
synchronous framing and error detection
functions of HDLC without windowing or
retransmission. This is the default for
synchronous serial interfaces.
• ppp—Point-to-Point Protocol (PPP) (for
serial interface).
• frame-relay—Frame Relay (for serial
interface).
Command Purpose