Configuration Commands
Page 220
7750 SR OS Interface Configuration Guide
When a port is being configured as a working circuit of an APS group, all common configuration as
described above and all service configurations related to the APS port is operationally inherited by
the working circuit from the aps-
group-id
. If the working circuit cannot inherit that configuration, for
example, due to resource limitations, the configuration attempt fails and an error is returned to the
user.
Before a working circuit can be removed from an APS group, the working circuit port must be
shutdown. The inherited configuration for the circuit and APS operational commands for that circuit
are not preserved when the circuit is removed from the APS group.
Note that all configurations for aps-
group-id
under the
config>port
context and its submenus and all
configuration for services that use this aps-
group-id
is preserved as a non-activated configuration
since the APS group no longer has any physical circuits assigned.
The
no
form of this command removes the working-circuit. The working circuit can only be removed
from the configuration after the protect circuit has been removed.
Default
none
Parameters
port-id —
Specify the physical port that will act as the working circuit for this APS group.
Syntax
:
port-id
:
slot/mda/port
Modifying Hold-Down Timer Values
Note that for APS configurations, the
hold-time down
and
default values are 100 ms
and 500 ms respectively. But, if there is a large difference in the transmission delay between the APS
working (
), it is highly suggested to increase the
default timer on the working line accordingly with the transmission delay present on the protect line.
See
on
The following output shows an example of the timers on POS interfaces.
A:NS044050253# show port aps-1
===============================================================================
SONET/SDH Interface
===============================================================================
Description : APS Group
Interface : aps-1 Speed : oc3
Admin Status : up Oper Status : up
Physical Link : Yes Loopback Mode : none
Single Fiber Mode : No
Clock Source : node Framing : sonet
Last State Change : 04/11/2007 13:53:01 Port IfIndex : 1358987264
J0 String : 2/1/5 7750-SR-7 Section Trace Mode : string
Rx S1 Byte : 0x00 Rx K1/K2 Byte : 0x00/0x00
Rx J0 String (Hex) : 81 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Cfg Alarm : loc lais lrdi ss1f lb2er-sd lb2er-sf slof slos lrei
Alarm Status :
Hold time up : 500 milliseconds
Hold time down : 100 milliseconds
===============================================================================
Port Statistics
===============================================================================
Input Output
-------------------------------------------------------------------------------
Packets 6670498 3804661
Содержание 7750 SR OS
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Страница 14: ...Preface Page 14 7750 SR OS Interface Configuration Guide ...
Страница 16: ...Getting Started Page 16 7750 SR OS Interface Configuration Guide ...
Страница 184: ...Card MDA and Port Command Reference Page 184 7750 SR OS Interface Configuration Guide ...
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