Table 20: Media MTU Sizes by Interface Type for MX Series
Routers (continued)
1500 (IPv4),
1488 (MPLS),
1497 (ISO)
91921514Channelized
SONET/SDH
OC3/STM1
(Multi-Rate)
1500 (IPv4),
1488 (MPLS),
1497 (ISO)
91921514DS3/E3 (Multi-Rate)
Media MTU Sizes by Interface Type for T320 Routers
Table 21: Media MTU Sizes by Interface Type for T320 Routers
Default IP Protocol
MTU (Bytes)
Maximum MTU
(Bytes)
Default Media
MTU (Bytes)Interface Type
447091924482ATM
447091924482ATM2 IQ
447091924474Channelized OC12 IQ
447091924474Channelized STM1 IQ
447045004471DS3
1500 (IPv4),
1497 (ISO)
1533 (4-port)
1532 (12- and 48-port)
1514Fast Ethernet
1500 (IPv4),
1497 (ISO)
91921514Gigabit Ethernet
447091924474SONET/SDH
447091924474CT3 IQ
Media MTU Sizes by Interface Type for T640 Platforms
Table 22: Media MTU Sizes by Interface Type for T640 Platforms
Default IP Protocol
MTU (Bytes)
Maximum MTU
(Bytes)
Default Media
MTU (Bytes)Interface Type
447091924482ATM2 IQ
1500 (IPv4),
1497 (ISO)
1532151448-port Fast Ethernet
61Copyright © 2015, Juniper Networks, Inc.
Chapter 2: Configuration Tasks