Enabling Or Disabling The Path Mtu Discovery Protocol - Enterasys Matrix 2G4072-52 Configuration Manual

2.2.10 Enabling or Disabling the Path MTU Discovery Protocol

Purpose
To enable or disable the path MTU (Maximum Transmission Unit) discovery protocol on the
device. Because ports with transmission speeds higher than 100 Mbps are capable of transmitting
frames up to a maximum of 10,239 bytes, it is necessary to have the path MTU discovery protocol
enabled if jumbo frames are allowed in the network. If the system receives a frame larger than the
destination port supports, it will send an "ICMP destination unreachable" error message indicating
to the transmitting station that it must fragment the frame.
NOTE: By default, path MTU discovery is enabled on the device and jumbo frame
support is disabled on all ports. When jumbo frame support is enabled with the set port
jumbo command, as described in
disabled.
Commands
The commands used to disable or re-enable the path MTU discovery protocol are listed below and
described in the associated sections as shown.
•
show mtu (Section
•
set mtu (Section
•
clear mtu (Section
2.2.10.1)
2.2.10.2)
2.2.10.3)
Matrix DFE-Platinum and Diamond Series Configuration Guide
Enabling or Disabling the Path MTU Discovery Protocol
Section 4.3.5.2, path MTU discovery should not be
General Configuration Command Set
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