From: Peng Zheng (zpnist@yahoo.com)
Date: Tue Jun 01 2004 - 12:42:35 GMT-3
But how can I only set DE for those traffic over
128kbps?
--- "James R. Yeo" <james@net-brigade.com> wrote:
> 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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>
This archive was generated by hypermail 2.1.4 : Sat Jul 03 2004 - 19:40:30 GMT-3