[c-nsp] Weird LAN problem between Cisco and Juniper

[Konstantin Barinov]

Hi,

Weird situation. Any ideas?

145 - cisco 7603
146 - cisco 3550
148 - juniper M20
149 - juniper M20

145 and 146 in one location, connected via several gigabit etherchannels
to 148 and 149 in second location. Switches in between are catalysts 4000 series.
No errors on catalyst ports. No errors on router ports. No filters, no
ACL's, no shapers. Nothing of that kind.

In general, high delay and 10-90% packet loss from .145 to .148
All other combinations work fine.


br
--
Konstantin Barinov
INFONET AS, Tallinn, Estonia






network 1.2.3.144/29


IP 1.2.3.145

akm-bb#ping 1.2.3.148

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.148, timeout is 2 seconds:
!..!!
Success rate is 60 percent (3/5), round-trip min/avg/max = 4/14/36 ms

akm-bb#ping 1.2.3.149

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.149, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

akm-bb#ping 1.2.3.146

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.146, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms



IP 1.2.3.146


akm-l3#ping 1.2.3.148

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.148, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms

akm-l3#ping 1.2.3.149

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.149, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms

akm-l3#ping 1.2.3.145

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 1.2.3.145, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms