From: Kohli, Harbir (harbir.kohli@xxxxxxxxxxxxxx)
Date: Wed Jan 09 2002 - 01:36:18 GMT-3
Hi,
I am trying a variant of the bootcamp lab 1 and am seeing some interesting
behaviour.
Every alternate ping to R2 from R1 fails with an encapsulation failure. It
should either have a map or it should not. Also I see failure with
broadcasts.
Note, if I put in a route to 10.10.1.2 pointing out s0.1 all pings make it
thorough.
Why? Also I see some broadcast failures, why ?
******************ERROR*******************
R1#ping 10.10.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.1.2, timeout is 2 seconds:
.!.!.
Success rate is 40 percent (2/5), round-trip min/avg/max = 36/36/36 ms
R1#
*Feb 28 19:02:52.379 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, sending
*Feb 28 19:02:52.383 est: Serial0:Encaps failed--no map entry link 7(IP)
*Feb 28 19:02:52.387 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, encapsulation failed
*Feb 28 19:02:54.375 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:02:54.379 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:02:54.403 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:02:54.407 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
*Feb 28 19:02:54.415 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, sending
*Feb 28 19:02:54.419 est: Serial0:Encaps failed--no map entry link 7(IP)
*Feb 28 19:02:54.423 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, encapsulation failed
*Feb 28 19:02:56.415 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
R
*Feb 28 19:02:56.419 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:02:56.443 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:02:56.447 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
*Feb 28 19:02:56.455 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, sending
*Feb 28 19:02:56.459 est: Serial0:Encaps failed--no map entry link 7(IP)
*Feb 28 19:02:56.463 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, encapsulation failed
*Feb 28 19:02:57.395 est: IP: s=10.1.1.1 (local), d=255.255.255.255
(Ethernet0), len 604, sending broad/multicast
*Feb 28 19:02:57.403 est: IP: s=201.201.201.1 (local), d=255.255.255.255
(Loopback0), len 604, sending broad/multicast
*Feb 28 19:02:57.407 est: IP: s=10.10.1.1 (local), d=255.255.255.255
(Serial0), len 604, sending broad/multicast
*Feb 28 19:02:57.415 est: Serial0: broadcast search
*Feb 28 19:02:57.415 est: Serial0:encaps failed on broadcast for link 7(IP)
*Feb 28 19:02:57.419 est: IP: s=10.10.1.1 (local), d=255.255.255.255
(Serial0), len 604, encapsulation failed
*Feb 28 19:02:57.423 est: IP: s=10.10.1.1 (local), d=255.255.255.255
(Serial0.1), len 604, sending broad/multicast
*Feb 28 19:02:57.431 est: Serial0.1: broadcast search
*Feb 28 19:02:57.431 est: Serial0.1:encaps failed on broadcast for link
7(IP)
*Feb 28 19:02:57.435 est: IP: s=
R1#ping 10.10.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.1.2, timeout is 2 seconds:
!.!.!
Success rate is 60 percent (3/5), round-trip min/avg/max = 36/36/36 ms
R1#
*Feb 28 19:13:15.307 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:13:15.311 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:13:15.335 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:13:15.339 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
*Feb 28 19:13:15.347 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, sending
*Feb 28 19:13:15.351 est: Serial0:Encaps failed--no map entry link 7(IP)
*Feb 28 19:13:15.355 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, encapsulation failed
*Feb 28 19:13:17.347 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:13:17.351 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:13:17.375 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:13:17.379 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
*Feb 28 19:13:17.387 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, sending
*Feb 28 19:13:17.391 est: Serial0:Encaps failed--no map entry link 7(IP)
*Feb 28 19:13:17.395 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0),
len 100, encapsulation failed
*Feb 28 19:13:19.387 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:13:19.391 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:13:19.415 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:13:19.419 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
R1#
R1#c
Enter configuration commands, one per line. End with CNTL/Z.
R1(config)# ip route 10.10.1.2 255.255.255.255 serial 0.1
R1(config)#^Z
R1#ping 10.10.1.2
*Feb 28 19:13:36.259 est: %SYS-5-CONFIG_I: Configured from console by
console
R1#ping 10.10.1.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.10.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 36/39/40 ms
R1#
*Feb 28 19:13:38.367 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:13:38.371 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:13:38.395 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:13:38.399 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
*Feb 28 19:13:38.407 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:13:38.411 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:13:38.435 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:13:38.439 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
*Feb 28 19:13:38.447 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:13:38.451 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:13:38.479 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:13:38.483 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
*Feb 28 19:13:38.487 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:13:38.495 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:13:38.519 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:13:38.523 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
*Feb 28 19:13:38.531 est: IP: s=10.10.1.1 (local), d=10.10.1.2 (Serial0.1),
len 100, sending
*Feb 28 19:13:38.535 est: Serial0.1(o): dlci 102(0x1861), pkt type
0x800(IP), datagramsize 104
*Feb 28 19:13:38.559 est: Serial0(i): dlci 102(0x1861), pkt type 0x800,
datagramsize 104
*Feb 28 19:13:38.563 est: IP: s=10.10.1.2 (Serial0.1), d=10.10.1.1, len 100,
rcvd 2
***********************************Configs
R1#sr
Building configuration...
Current configuration : 1412 bytes
!
version 12.1
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
no service password-encryption
!
hostname R1
!
enable password cisco
!
!
!
!
!
clock timezone est -5
clock summer-time edt recurring
ip subnet-zero
no ip finger
no ip domain-lookup
!
cns event-service server
!
!
!
interface Loopback0
ip address 201.201.201.1 255.255.255.0
!
interface Ethernet0
ip address 10.1.1.1 255.255.0.0
!
interface Serial0
ip address 10.10.1.1 255.255.0.0
encapsulation frame-relay
ip ospf hello-interval 10
no fair-queue
no frame-relay inverse-arp
!
interface Serial0.1 multipoint
ip address 10.10.1.1 255.255.0.0
ip ospf hello-interval 10
frame-relay map ip 10.10.1.2 102
frame-relay map ip 10.10.1.3 103
frame-relay map ip 10.10.1.5 105
no frame-relay inverse-arp
!
interface Serial1
no ip address
encapsulation frame-relay
!
ip classless
ip route 10.10.1.2 255.255.255.255 Serial0.1
no ip http server
!
!
alias exec ro show ip route
alias exec o show ip ospf
alias exec ix show ipx route
alias exec int show ip int brief
alias exec c conf terminal
alias exec sr show run
alias exec pvc show frame pvc
!
line con 0
exec-timeout 3600 0
password cisco
logging synchronous
transport input none
line aux 0
exec-timeout 3600 0
password cisco
transport input telnet
line vty 0 4
exec-timeout 3600 0
password cisco
login
!
end
***************************************************R2
R2#sh run
Building configuration...
Current configuration : 1215 bytes
!
version 12.1
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
no service password-encryption
!
hostname R2
!
enable password cisco
!
!
!
!
!
clock timezone est -5
clock summer-time edt recurring
ip subnet-zero
no ip finger
no ip domain-lookup
!
cns event-service server
!
!
!
interface Loopback0
ip address 200.200.200.1 255.255.255.0
!
interface Loopback1
ip address 220.20.20.1 255.255.255.0
!
interface Ethernet0
ip address 137.20.20.1 255.255.255.0
!
interface Serial0
ip address 10.10.1.2 255.255.0.0
encapsulation frame-relay
ip ospf hello-interval 10
no fair-queue
frame-relay map ip 10.10.1.1 201
no frame-relay inverse-arp
!
interface Serial1
no ip address
!
ip classless
no ip http server
!
!
alias exec ro show ip route
alias exec o show ip ospf
alias exec ix show ipx route
alias exec int show ip int brief
alias exec c conf terminal
alias exec sr show run
alias exec pvc show frame pvc
!
line con 0
exec-timeout 3600 0
password cisco
logging synchronous
transport input none
line aux 0
exec-timeout 3600 0
password cisco
transport input telnet
line vty 0 4
exec-timeout 3600 0
password cisco
login
!
end
R2#
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