Alcatel-Lucent 7750 SR OS Interface Configuration Manual page 317

Default
none
Parameters port-id — Specify the physical port that will act as the working circuit for this APS group.
Modifying Hold-Down Timer Values
Note that for APS configurations, the hold-time down and hold-time up default values are 100 ms
and 500 ms respectively. But, if there is a large difference in the transmission delay between the APS
working (working-circuit) and protect line (protect-circuit), it is highly suggested to increase the
default timer on the working line accordingly with the transmission delay present on the protect line.
See
The following output shows an example of the timers on POS interfaces.
A:NS044050253# show port aps-1
===============================================================================
SONET/SDH Interface
===============================================================================
Description
Interface
Admin Status
Physical Link
Single Fiber Mode
Clock Source
Last State Change
J0 String
Rx S1 Byte
Tx S1 Byte
Rx J0 String (Hex) : 81 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Cfg Alarm
Alarm Status
Hold time up
Hold time down
===============================================================================
Port Statistics
===============================================================================
Input
-------------------------------------------------------------------------------
Packets
Discards
Unknown Proto Discards
===============================================================================
A:NS044050253#
For unprotected port these timer are different:
A:NS044050253# show port 2/2/2
===============================================================================
SONET/SDH Interface
===============================================================================
Description
Interface
Admin Status
Physical Link
Single Fiber Mode
APS Group
7750 SR OS Interface Configuration Guide
Syntax:
port-id:
hold-time on page 375.
: APS Group
: aps-1
: up
: Yes
: No
: node
: 04/11/2007 13:53:01
: 2/1/5 7750-SR-7
: 0x00 (stu)
: 0x0f (dnu)
: loc lais lrdi ss1f lb2er-sd lb2er-sf slof slos lrei
:
: 500 milliseconds
: 100 milliseconds
Output
: OC-48 SONET/SDH
: 2/2/2
: up
: Yes
: No
: none
slot/mda/port
Speed
Oper Status
Loopback Mode
Framing
Port IfIndex
Section Trace Mode
Rx K1/K2 Byte
Tx DUS/DNU
6670498
Speed
Oper Status
Loopback Mode
APS Role
Interface Configuration
: oc3
: up
: none
: sonet
: 1358987264
: string
: 0x00/0x00
: disabled
3804661
0
0
: oc48
: up
: none
: none
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