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Cisco 10000 Series Router Quality of Service Configuration Guide
OL-7433-09
Chapter 16 Fragmenting and Interleaving Real-Time and Nonreal-Time Packets
FRF.12 Fragmentation
frame-relay fragment Command (Map-Class)
To enable the fragmentation of Frame Relay frames on a Frame Relay map class, use the
frame-relay
fragment
command in map-class configuration mode. To disable Frame Relay fragmentation, use the
no
form of the command. By default, fragmentation is disabled.
frame-relay
fragment
fragment_size
no
frame-relay
fragment
fragment_size
Syntax Description
frame-relay fragment Command History
Usage Guidelines for the frame-relay fragment Command
Frame Relay fragmentation is enabled on a per-PVC basis. Before enabling Frame Relay fragmentation,
you must first associate a Frame Relay map class with a specific data-link connection identifier (DLCI),
and then enter map-class configuration mode and enable or disable fragmentation for that map class.
All of the fragments of a Frame Relay frame except the last one have a payload size that is equal to the
fragment size. The last fragment has a payload that is less than or equal to the fragment size.
frame-relay fragment end-to-end Command (Interface)
To enable the fragmentation of Frame Relay frames on an interface, use the
frame-relay fragment
end-to-end
command in interface configuration mode. To disable Frame Relay fragmentation, use the
no
form of the command.
frame-relay
fragment
fragment_size
end-to-end
no
frame-relay
fragment
fragment_size
end-to-end
Syntax Description
fragment_size
Specifies the number of payload bytes from the original Frame Relay frame
that go into each fragment. This number excludes the Frame Relay header
of the original frame. Valid values are from 16 to 1600 bytes. However, the
minimum supported fragment size is 44 bytes. The default is 53 bytes.
Cisco IOS Release
Description
Release 12.0(23)SX
The
frame-relay fragment
command was introduced on the PRE1.
Release 12.2(27)SBB
This command was introduced on the PRE2.
Release 12.2(31)SB2
This command was introduced on the PRE3.
fragment_size
Specifies the number of payload bytes from the original Frame Relay frame
that go into each fragment. This number excludes the Frame Relay header
of the original frame. Valid values are from 16 to 1600 bytes. There is no
default fragment size.
Note
You must specify the fragment_size. If you do not, an error message
displays.