From: Ivan (ivan@iip.net)
Date: Mon Apr 16 2007 - 04:08:52 ART
Locally originated traffic is alays proccess-switched. To test this you must
track to the pass through packets.
On Sunday 15 April 2007 02:55, Sean.Zimmerman@clubcorp.com wrote:
> I was doing a practice lab today that called for the use of a DE list.
> "Mark all IP packets greater than 512 with the DE bit" I configured it as
> requested and left the switching modes to default, then I pinged with
> packets greater than 512, and the "out DE packets" counter incremented. I
> thought that since that doc CD was quite clear on requiring process
> switching to support the DE group function, this must be a false counter.
> But the "In DE packets" on the frame switch had also incremented.
> I also tried the same thing on frame relay configured directly on an
> interface, and I had the same result.
>
> Some questions:
>
> Is the process switching requirement platform specific?
> Is this just an old remnant that needs to be removed from the doc CD?
>
>
> Here's the output from my verification (I've removed some lines from the
> interface config for brevity)
>
>
> R2#sh run inter s0/0.24
> interface Serial0/0.24 multipoint
> ip address 172.16.24.0 255.255.255.254
> frame-relay de-group 1 104
>
> R2#sh ip cef s0/0.24
> 172.16.24.0/31 attached Serial0/0.24
> 172.16.24.1/32 172.16.24.1 Serial0/0.24
> 192.168.4.4/32 172.16.24.1 Serial0/0.24
> 192.168.40.0/24 172.16.24.1 Serial0/0.24
>
> R2#sh run | inc de-list
> frame-relay de-list 1 protocol ip gt 512
>
> R2#sh frame pvc 104 | include DE
> out BECN pkts 0 in DE pkts 0 out DE pkts 37
> ________________________
> FRAME SWITCH
> ________________
> IPR3_FR_Switch#sh frame pvc 104 | includ DE
> out BECN pkts 0 in DE pkts 37 out DE pkts 0
> shaping Q full 0 pkt above DE 0 policing drop 0
> ------------------------------------------
> SMALL PINGS
> ------------------------------------------
> R2#ping 172.16.24.1 size 400
>
> Type escape sequence to abort.
> Sending 5, 400-byte ICMP Echos to 172.16.24.1, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 204/210/220 ms
> ------------------------------------------
> COUNTER DIDN'T INCREMENT
> ________________________
> R2#sh frame pvc 104 | include DE
> out BECN pkts 0 in DE pkts 0 out DE pkts 37
>
> IPR3_FR_Switch#sh frame pvc 104 | includ DE
> out BECN pkts 0 in DE pkts 37 out DE pkts 0
> shaping Q full 0 pkt above DE 0 policing drop 0
> IPR3_FR_Switch#
>
> ------------------------------------------
> LARGE PINGS
> ------------------------------------------
>
> R2#ping 172.16.24.1 size 512
>
> Type escape sequence to abort.
> Sending 5, 512-byte ICMP Echos to 172.16.24.1, timeout is 2 seconds:
> !!!!!
> Success rate is 100 percent (5/5), round-trip min/avg/max = 260/262/265 ms
> ------------------------------------------
> OUT DE INCREMENTED BY 5
> ------------------------------------------
> R2#sh frame pvc 104 | include DE
> out BECN pkts 0 in DE pkts 0 out DE pkts 42
>
> ------------------------------------------
> VERIFIED ON THE FRAME SWITCH
> ------------------------------------------
>
> IPR3_FR_Switch#sh frame pvc 104 | includ DE
> out BECN pkts 0 in DE pkts 42 out DE pkts 0
> shaping Q full 0 pkt above DE 0 policing drop 0
>
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This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:35 ART