From: James R. Yeo (james@net-brigade.com)
Date: Tue Jun 01 2004 - 10:14:20 GMT-3
Hope this helps:
Read below or go to link instead:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122newft/12
2tcr/122twr/wftfr1.htm#1018321
Straight from the documentation
frame-relay de-list
To define a discard eligibility (DE) list specifying the packets that have
the DE bit set and thus are eligible for discarding when congestion occurs
on the Frame Relay switch, use the frame-relay de-list command inglobal
configurationmode. To delete a portion of a previously defined DE list,
use the no form of this command.
frame-relay de-list list-number {protocol protocol | interface type
number} characteristic
no frame-relay de-list list-number {protocol protocol | interface type
number} characteristic
Syntax Description
list-number
Number of the DE list.
protocol protocol
One of the following values corresponding to a supported protocol or
device:
arpAddress Resolution Protocol.
appletalkAppleTalk.
bridgebridging device.
clnsISO Connectionless Network Service.
clns_esCLNS end systems.
clns_isCLNS intermediate systems.
compressedtcpCompressed TCP.
decnetDECnet.
decnet_nodeDECnet end node.
decnet_router-L1DECnet Level 1 (intra-area) router.
decnet_router-L2DECnet Level 2 (interarea) router.
ipInternet Protocol.
ipxNovell Internet Packet Exchange Protocol.
interface type
One of the following interface types: serial, null, or ethernet.
number
Interface number.
characteristic
One of the following values:
fragmentsFragmented IP packets
gt bytesSets the DE bit for packets larger than the specified number of
bytes (including the 4-byte Frame Relay encapsulation).
list access-list-numberPreviously defined access list number.
lt bytesSets the DE bit for packets smaller than the specified number of
bytes (including the 4-byte Frame Relay encapsulation).
tcp portTCP packets to or from a specified port.
udp portUser Datagram Protocol (UDP) packets to or from a specified port.
Defaults
Discard eligibility is not defined.
Command Modes
Global configuration
Command History
Release Modification
10.0
This command was introduced.
12.2(13)T
The apollo, vines, and xns arguments were removed because Apollo Domain,
Banyan VINES, and Xerox Network Systems are no longer available in the
Cisco IOS software.
Usage Guidelines
To remove an entire DE list, use the no form of this command with no
options and arguments.
This prioritizing feature requires that the Frame Relay network be able to
interpret the DE bit as indicating which packets can be dropped first in
case of congestion, or which packets are less time sensitive, or both.
When you calculate packet size, include the data packet size, the ICMP
header, the IP header, and the Frame Relay encapsulation bytes. For
example, count 92 bytes of data, 8 bytes for the ICMP header, 20 bytes for
the IP header, and 4 bytes for the Frame Relay encapsulation, which equals
124 bytes.
Examples
The following example specifies that IP packets larger than 512 bytes
(including the 4-byte Frame Relay encapsulation) will have the DE bit set:
frame-relay de-list 1 protocol ip gt 512
Kind regards
James Yeo
On Tue, 1 Jun 2004 00:55:24 -0700 (PDT), Peng Zheng <zpnist@yahoo.com>
wrote :
> Requirement: configure traffic-shaping, set DE for all
> traffic over 128kbps.
>
> How can I gurantee the traffic will be set DE bit?
>
>
>
>
>
>
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