From: Vincent Mashburn (vmashburn@fedex.com)
Date: Tue Nov 28 2006 - 11:03:10 ART
Try debugging "ip icmp" and "debug ip packet" on the interface that
responds to ping and on the interface that does not respond to ping and
see what the differences are. This will give you a better insight of
what is actually going on from the router's perspective.
Vince Mashburn
Sr. Voice / Data Engineer
901-263-5072
CCVP, CCNP
Cisco IP Telephony Support Specialist
Cisco IP Telephony Operations Specialist
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Michael Zuo
Sent: Monday, November 27, 2006 11:31 PM
To: Schulz, Dave; Cisco certification
Subject: RE: Weird PING problem
Strange. on another interface it can ping itself:
R4(config-if)#do sh run int s0/1
Building configuration...
Current configuration : 103 bytes
!
interface Serial0/1
ip address 139.1.45.4 255.255.255.0
ip rip advertise 3
encapsulation ppp
end
R4(config-if)#do ping 139.1.45.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 139.1.45.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 64/67/76 ms
R4(config-if)#
-----Original Message-----
From: Schulz, Dave [mailto:DSchulz@dpsciences.com]
Sent: Friday, November 24, 2006 10:38 PM
To: Michael Zuo; Cisco certification
Subject: RE: Weird PING problem
Michael -
This is normal for a ppp interface. I believe that you will find that
you can ping the remote side.
Dave Schulz,
Email: dschulz@dpsciences.com
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Michael Zuo
Sent: Friday, November 24, 2006 11:14 PM
To: Cisco certification
Subject: Weird PING problem
Hi Group,
I have a serial interface that can not ping itself (see attached), very
strange. Anyone can tell me why? Thanks in advance
R5(config)#do sh run int s0/1
Building configuration...
Current configuration : 158 bytes
!
interface Serial0/1
ip address 156.1.45.5 255.255.255.0
encapsulation ppp
clock rate 64000
ppp authentication chap pap
service-policy output VOIP
end
R5(config)#do ping 156.1.45.5
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 156.1.45.5, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R5(config)#do sh int s0/1
Serial0/1 is up, line protocol is up
Hardware is PowerQUICC Serial
Internet address is 156.1.45.5/24
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Open
Open: CDPCP, IPCP, loopback not set
Keepalive set (10 sec)
Last input 00:00:38, output 00:00:05, output hang never
Last clearing of "show interface" counters 00:28:12
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: Class-based queueing
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/2/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1094 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
761 packets input, 56305 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
2 input errors, 0 CRC, 2 frame, 0 overrun, 0 ignored, 0 abort
755 packets output, 56799 bytes, 0 underruns
0 output errors, 0 collisions, 3 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
R5(config)#do sh run | be policy-map VOIP
policy-map VOIP
class VOIP
priority 64
policy-map BB2Child
class VOIP
priority 64
class ICMP
police 16000
policy-map BB2
class class-default
shape average 2500000
set dscp ef
service-policy BB2Child
policy-map BB3Child
class ICMP
police 16000
policy-map BB3
class class-default
shape average 3000000
set dscp ef
service-policy BB3Child
!
!
R5(config)#
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