Interfaces
Page 412 7750 SR Interface Configuration Guide
figured on a port with a null encapsulation type.
qinq — Specifies QinQ encapsulation.
hold-time
Syntax hold-time {[up hold-time up] [down hold-time down] [seconds | centiseconds]}
no hold-time
Context config>port>ethernet
Description This command configures port link dampening timers which reduce the number of link transitions reported
to upper layer protocols. The hold-time value is used to dampen interface transitions.
When an interface transitions from an up state to a down state, it is immediately advertised to the rest of the
system if the hold-time down interval is zero, but if the hold-time down interval is greater than zero, inter-
face down transitions are not advertised to upper layers until the hold-time down interval has expired. Like-
wise, an interface is immediately advertised as up to the rest of the system if the hold-time up interval is
zero, but if the hold-time up interval is greater than zero, up transitions are not advertised until the hold-time
up interval has expired.
For ESM SRRP setup, MCS is used to synchronizing subscriber information between the two chassis. After
a chassis recovers from a power reset/down, MCS immediately synchronizes all subscriber information at
once. The longer the host list, the longer it will take to synchronize the chassis. In a fully populated chassis,
it is recommended to allow at least 45 minutes for MCS synchronization. It is also recommended to hold the
port down, facing the subscriber, on the recovering chassis for 45 minutes before it is allowed to forward
traffic again.
The no form of this command reverts to the default values.
Default
down 0 seconds — No port link down dampening is enabled; link down transitions are immediately reported
to upper layer protocols.
up 0 seconds — No port link up dampening is enabled; link up transitions are immediately reported to upper
layer protocols.
Parameters up hold-time up — — The delay, in seconds or centiseconds, to notify the upper layers after an interface
transitions from a down state to an up state.
Values 0 — 36000 seconds
0, 10 — 3600000 centiseconds in 5 centisecond increments
down hold-time down — The delay, in seconds or centiseconds, to notify the upper layers after an interface
transitions from an up state to a down state.
Values 0 — 36000 seconds
0, 10 — 3600000 centiseconds in 5 centisecond increments
seconds | centiseconds — Specify the units of your hold time in seconds or centiseconds.
Note:
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