Media MTU Sizes by Interface Type for M5 and M7i Routers with CFEB, M10 and M10i Routers
with CFEB, and M20 and M40 Routers
Table 16: Media MTU Sizes by Interface Type for M5 and M7i Routers with
CFEB, M10 and M10i Routers with CFEB, and M20 and M40 Routers
Default IP Protocol
MTU (Bytes)
Maximum MTU
(Bytes)
Default Media
MTU (Bytes)Interface Type
N/AN/A9192Adaptive Services
(MTU size not
configurable)
447091924482ATM
150091921504E1/T1
447091924474E3/T3
1500 (IPv4),
1497 (ISO)
1533 (4-port)
1532 (8-port)
1532 (12-port)
NOTE: The maximum
MTU for two
100Base-TX Fast
Ethernet port FIC is
9192 bytes.
1514Fast Ethernet
1500 (IPv4),
1497 (ISO)
9192
NOTE: The maximum
MTU for one Gigabit
Ethernet port FIC is
9192 bytes.
1514Gigabit Ethernet
1500 (IPv4),
1497 (ISO)
91921504Serial
447091924474SONET/SDH
Media MTU Sizes by Interface Type for M40e Routers
Table 17: Media MTU Sizes by Interface Type for M40e Routers
Default IP Protocol
MTU (Bytes)Maximum MTU (Bytes)
Default Media
MTU (Bytes)Interface Type
N/AN/A9192Adaptive Services
(MTU size not
configurable)
447091924482ATM
57Copyright © 2015, Juniper Networks, Inc.
Chapter 2: Configuration Tasks