Juniper SRX320 User Manual

Table 8: MTU Terms
DefinitionTerm
Default value of the MTU at the physical interface. The maximum value of the MTU
at the physical interface includes the protocol overhead. You can configure the default
MTU value at the physical interface by using the following command:
set interface interface-name mtu mtu-value
Physical Interface MTU–Default
Default value of the MTU at the logical interface. The default value is configured at
the family level and does not include the protocol overhead. You can configure the
default MTU value for each logical unit at the logical interface by using the following
command:
set interface interface-name unit interface-unit-number family family-name mtu
mtu-value
Logical Interface MTU–Default
Maximum MTU is the size, measured in bytes, of the largest physical packet that a
network can transmit. Any message larger than the MTU is divided into smaller
packets before it is sent to its final destination.
Maximum MTU
Table 9 on page 9 lists the MTU values for the SRX300 Series and SRX550 High Memory
Services Gateway Physical Interface Modules (PIMs).
Table 9: MTU Values for the SRX300 Series and SRX550 High Memory
PIMs
Maximum MTU
(Bytes)
Logical Interface
MTU
(Bytes)–Default
Physical Interface
MTU
(Bytes)–DefaultPIM
200015001504Serial Mini-PIM
200015001504T1/E1 Mini-PIM
9192150015148–Port Gigabit
Ethernet small
form–factor
pluggable (SFP) XPIM
91921500151416–Port Gigabit
Ethernet XPIM
NOTE: The LTE Mini-PIM uses the MTU value reported by the modem.
Table 10 on page 10 lists maximum transmission unit (MTU) values for VDSL- Mini-PIM
AT mode (Encapsulation).
9Copyright © 2017, Juniper Networks, Inc.
Chapter 1: SRX Series Services Gateway Interface Modules Support

Juniper SRX320 Specifications

General

Firewall throughput	1000 Mbit/s
Number of users	50 user(s)
Quality of Service (QoS) support	Yes
Mobile VPN IPSec	250
IPS/IDS throughput	100 Mbit/s
USB 2.0 ports quantity	1
Connectivity technology	Wired
SFP module slots quantity	2
Ethernet LAN (RJ-45) ports	6
Internal memory	4000 MB
Flash memory	8000 MB
Storage media type	Flash
Power consumption (typical)	27 W
Heat dissipation	157 BTU/h
Concurrent connections	64000
Mean time between failures (MTBF)	284700 h
Storage temperature (T-T)	-20 - 70 °C
Operating temperature (T-T)	0 - 40 °C
Storage relative humidity (H-H)	5 - 95 %
Operating relative humidity (H-H)	10 - 90 %
Routing protocols	BGP, CLNS, IS-IS, OSPF, RIP-1, RIP-2

Weight and Dimensions

Weight	1510 g
Dimensions (WxDxH)	299.9 x 43.9 x 191 mm