From: Sean.Zimmerman@clubcorp.com
Date: Sat Apr 14 2007 - 19:55:37 ART
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
This archive was generated by hypermail 2.1.4 : Tue May 01 2007 - 08:28:35 ART