MPPE - The link comes up but unable to send data

Hi Team,

I have run into an issue with MPPE where the link comes up but when I try to
ping across it all pings timeout. If I remove encryption everything works
fine. Following are my configurations:

==============================On R5========================
Rack29R5#sh run int s0/1/0
Building configuration...

Current configuration : 163 bytes
!
interface Serial0/1/0
 ip address 155.29.45.5 255.255.255.0
 encapsulation ppp
 ip ospf 1 area 0
 ppp encrypt mppe 128 required
 ppp authentication ms-chap
end

Rack29R5#sh ip int b | i S.*0/1/0
Serial0/1/0 155.29.45.5 YES manual up
 up
Rack29R5#sh ppp mpp s0/1/0
Interface Serial0/1/0 (current connection)
  Software encryption, 128 bit encryption, Stateless mode
  packets encrypted = 206 packets decrypted = 205
  sent CCP resets = 0 receive CCP resets = 0
  next tx coherency = 206 next rx coherency = 205
  tx key changes = 206 rx key changes = 205
  rx pkt dropped = 0 rx out of order pkt= 0
  rx missed packets = 0

Rack29R5#ping 155.29.45.4

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 155.29.45.4, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

=====================On R4==========================

Rack29R4#SH RUN INT S0/1/0
Building configuration...

Current configuration : 172 bytes
!
interface Serial0/1/0
 ip address 155.29.45.4 255.255.255.0
 encapsulation ppp
 ip ospf 1 area 0
 clock rate 64000
 ppp encrypt mppe 128
 ppp authentication ms-chap
end

Rack29R4#SH IP INT B | I S.*0/1/0
Serial0/1/0 155.29.45.4 YES manual up
 up
Rack29R4#SH PPP MPP S0/1/0
Interface Serial0/1/0 (current connection)
  Software encryption, 128 bit encryption, Stateless mode
  packets encrypted = 218 packets decrypted = 224
  sent CCP resets = 0 receive CCP resets = 0
  next tx coherency = 218 next rx coherency = 224
  tx key changes = 218 rx key changes = 224
  rx pkt dropped = 0 rx out of order pkt= 0
  rx missed packets = 0

Rack29R4#PING 155.29.45.5

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 155.29.45.5, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
=======================================================

Does anybody have any idea of why this is happening?

I really appreciate your help.

Thanks,
Jorge

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Received on Mon Mar 21 2011 - 19:59:11 ART