19-4
ATM Switch Router Software Configuration Guide
OL-7396-01
Chapter 19
Configuring Circuit Emulation Services
Configuring CES T1/E1 Interfaces
The following defaults are assigned to CES T1 port adapters:
•
Framing = ESF
•
Line coding = B8ZS
The following defaults are assigned to CES E1 port adapters:
•
Framing = E1_LT
•
Line coding = HDB3
•
International bits = 0x3
•
National bits = 0x1f
•
Multiframe spare bits = 0xb
Configuring CES T1/E1 Interfaces
To manually change any of the CES T1/E1 default configuration values, enter the
interface cbr
global
configuration command to specify a CBR interface, as follows:
interface cbr
card
/
subcard
/
port
To configure the CES T1/E1 interfaces perform the following commands, beginning in global
configuration mode:
Command
Purpose
Step 1
Switch(config)#
interface cbr
card
/
subcard
/
port
Switch(config-if)#
Selects the physical interface to be configured and
enters global configuration mode.
Step 2
Switch(config-if)#
shutdown
Disables the interface.
Step 3
Switch(config-if)#
ces aal1 service
{
structured
|
unstructured
}
Configures the service type. The default is
unstructured
.
Step 4
Switch(config-if)#
ces aal1 clock
{
adaptive
|
srts
|
synchronous
}
Configures the type of clocking.
Note
For structured CES, the default is
synchronous
.
Step 5
Switch(config-if)#
ces circuit
circuit-id
[
cas
]
[
cdv
max-req
] [
circuit-name
name
]
[
partial-fill
number
] [
shutdown
]
[
timeslots
number
]
[
on-hook-detect
pattern
]
Configures the following CES connection attributes
for the circuit:
•
Circuit id number.
–
For unstructured service, use 0.
–
For CES T1 structured service,
use 1 through 24.
–
For CES E1 structured service,
use 1 through 31.
•
Enables channel-associated signalling for
structured service only. The default is no cas.
•
Enables the peak-to-peak cell delay variation
requirement. The default is 2000 milliseconds.