Copyright © 2010, Juniper Networks, Inc.
Table 193: Media MTU Sizes by Interface Type for M40e Routers
Default Media
Interface Type
MTU (Bytes)
Adaptive Services
9192
(MTU size not
configurable)
ATM
4482
E1/T1
1504
E3/T3
4474
E3/DS3 IQ
4474
Fast Ethernet
1514
Gigabit Ethernet
1514
Serial
1504
SONET/SDH
4474
Chapter 58: Configuring Interfaces
Maximum MTU (Bytes)
N/A
9192
4500
4500
9192 (4-port)
9192
4500
9192 (1- or 2-port)
9192 (4-port)
9192
4500 (1-port
nonconcatenated)
9192 (4-port OC3)
9192 (4-port OC3c)
4500 (1-port OC12)
4500 (4-port OC12)
4500 (4-port OC12c)
4500 (1-port OC48)
9192 (2-port OC3)
9192 (2-port OC3c)
9192 (1-port OC12c)
9192 (1-port OC48c)
4500 (1-port OC192)
9192 (1-port OC192c)
Default IP Protocol
MTU (Bytes)
N/A
4470
1500
4470
4470
1500 (IPv4), 1497
(ISO)
1500 (IPv4), 1497
(ISO)
1500 (IPv4), 1497
(ISO)
4470
1305