Configuring Channelized SONET/SDH on the Cisco ASR 9000 Series Router
How to Configure Channelized SONET/SDH
HC-329
Cisco ASR 9000 Aggregation Services Router Interfaces and Hardware Component Configuration Guide
OL-26061-03
Step 3
clock source {internal | line}
Example:
RP/0/RSP0/CPU0:router(config-sonet)#
clock source internal
Configures the SONET port transmit clock source, where the
internal keyword sets the internal clock and the line keyword sets
the clock recovered from the line.
• Use the line keyword whenever clocking is derived from the
network. Use the internal keyword when two routers are
connected back to back or over fiber for which no clocking is
available.
• line is the default keyword.
Note Internal clocking is required for SRP interfaces.
Step 4
framing sonet
Example:
RP/0/RSP0/CPU0:router(config-sonet)#
framing sonet
Configures the controller for SONET framing.
SONET framing (sonet) is the default.
Step 5
sts number
Example:
RP/0/RSP0/CPU0:router(config-sonet)# sts
1
Configures the STS stream specified by number. The ranges are:
• 1 to 48—1 Port Channelized OC-48/STM-16 SPA
• 1 to 3—1-Port Channelized OC-3/STM-1 SPA
• 1 to 12—2-Port Channelized OC-12/DS0 SPA
Step 6
mode mode
Example:
RP/0/RSP0/CPU0:router(config-stsPath)#
mode t3
Sets the mode of interface at the STS level. The possible modes are:
• t3—SONET path carrying T3
• vt15-t1—SONET path carrying virtual tributary 1.5 T1s
(VT15 T1) (1-Port Channelized OC-3/STM-1 SPA and 2-Port
Channelized OC-12c/DS0 SPA only)
• pos—Packet over SONET
Step 7
width number
Example:
RP/0/RSP0/CPU0:router(config-stsPath)#
width 3
Configures the number of the STS streams that are concatenated.
The possible values for number are:
• 1—Indicating one STS stream
• 3—Indicating three STS streams (STS-3c)
• 12—Indicating concatenation of 12 STS streams (STS-12c)
• 48—Indicating concatenation of 48 STS streams (STS-48c).
This is the default on the 1-Port Channelized OC-48/STM-16
SPA.
Widths 3, and 12, and 48 are configured on STS paths at natural
boundaries, which coincide with the following path numbers:
• 1, 4, 7, 10, and so on, for STS-3c
• 1, 13, 25, and 37 for STS-12c
• 1 for STS-48c
Step 8
root
Example:
RP/0/RSP0/CPU0:router(config-stsPath)#
root
Exits to global configuration mode.
Command or Action Purpose