General
Symptom:
The 3925 with HWIC-4B-S/T drops the first two packets on ping of
dial-out on the following network though the 2811 with HWIC-4B-S/T
drops only the first one packet as follows.
[3925]HWIC-4B-S/T-----[Telco ISDN BRI]-----HWIC-4B-S/T[2811]
3925#ping 10.0.0.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.1, timeout is 2 seconds:
..!!! <---
Success rate is 60 percent (3/5), round-trip min/avg/max = 40/40/40 ms
2811#ping 10.0.0.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.0.0.2, timeout is 2 seconds:
.!!!! <---
Success rate is 80 percent (4/5), round-trip min/avg/max = 40/40/40 ms
General
Conditions:
x: Problem Case: The first two packets drop.
o: OK Case: Only the first one packet drops.
IOS:15.0(1)M3 15.1(2)T1 15.1(2)T2
C3925E & HWIC-4B-S/T x x
C3925 & HWIC-4B-S/T x x
C3925 & WIC-1B-S/T-V3 o o
C2911 & HWIC-4B-S/T o x
C2911 & WIC-1B-S/T-V3 o o
C2811 & HWIC-4B-S/T o
C2811 & WIC-1B-S/T-V3 o
General
Workaround:
It might be a workaround to add "dialer hold-queue 1" to Dialer
interface as follows.
interface Dialer1
dialer hold-queue 1 <---
