Juniper EX2200 Hardware Guide

hold-time (Physical Interface)
Syntax hold-time up milliseconds down milliseconds;
Hierarchy Level [edit interfaces interface-name],
[edit interfaces interface-range interface-range-name]
Release Information Statement introduced before Junos OS Release 7.4.
Command introduced in Junos OS Release 10.4R5 for EX Series switches.
Command introduced in Junos OS Release 11.1 for the QFX Series.
Statement introduced in Junos OS Release 12.2 for ACX Series Universal Access Routers.
Description Specify the hold-time value to use to damp interface transitions. When an interface goes
from up to down, it is not advertised to the rest of the system as being down until it has
remained down for the hold-time period. Similarly, an interface is not advertised as being
up until it has remained up for the hold-time period.
NOTE:
• We recommend that you configure the hold-time value after determining
an appropriate value by performing repeated tests in the actual hardware
environment. This is because the appropriate value for hold-time depends
on the hardware (XFP, SFP, SR, ER, or LR) used in the networking
environment.
• The hold-time option is not available for controller interfaces.
Default Interface transitions are not damped.
Options down milliseconds—Hold time to use when an interface transitions from up to down.
Junos OS advertises the transition within 100 milliseconds of the time value you
specify.
Range: 0 through 4,294,967,295 milliseconds
Default: 0 milliseconds (interface transitions are not damped)
up milliseconds—Hold time to use when an interface transitions from down to up. Junos
OS advertises the transition within 100 milliseconds of the time value you specify.
Range: 0 through 4,294,967,295 milliseconds
Default: 0 milliseconds (interface transitions are not damped)
Required Privilege
Level
interface—To view this statement in the configuration.
interface-control—To add this statement to the configuration.
Related
Documentation
• advertise-interval
• interfaces (for EX Series switches)
185Copyright © 2015, Juniper Networks, Inc.
Chapter 3: Configuration Statements

Juniper EX2200 Specifications

General

Throughput	77 Mpps
MAC address table	8000 entries
Jumbo frames support	Yes
Number of VLANs	1024
Networking standards	-
Switch type	Managed
SFP module slots quantity	4
Installed SFP modules quantity	0
Basic switching RJ-45 Ethernet ports quantity	48
Stackable	No
Product color	Black
Power consumption (typical)	100 W
Operating altitude	0 - 3048 m
Non-operating altitude	0 - 4877 m
Storage temperature (T-T)	-40 - 70 °C
Operating temperature (T-T)	0 - 45 °C
Storage relative humidity (H-H)	0 - 95 %
Operating relative humidity (H-H)	10 - 85 %

Weight and Dimensions

Depth	254 mm
Width	441 mm
Height	43 mm
Weight	3600 g