[smokeping-users] Re: fping issue?

[Dmitry Melekhov]

Hello!

Long time ago I wrote


>I have absolutely the same problem over one of our links.
>
>fping 192.168.101.1 -b 1500
>192.168.101.1 is unreachable
>
>ping 192.168.200.230  -s 1500
>PING 192.168.200.230 (192.168.200.230) 1500(1528) bytes of data.
>1508 bytes from 192.168.200.230: icmp_seq=1 ttl=254 time=24.9 ms
>
>but
>
>fping 192.168.200.230 -b 12
>192.168.200.230 is alive
>
>I looked into packets and see that there is difference in content.
>This is 2Mbit hdlc link betwee cisco 3660 and 1751...
>
>Strange but true...
>

Today I found how to fix this.

diff fping.c fping.c.orig
1436,1437c1436
< //    memset( buffer, 0, ping_pkt_size * sizeof( char ) );
<       memset( buffer, 1, ping_pkt_size * sizeof( char ) );
---
>       memset( buffer, 0, ping_pkt_size * sizeof( char ) );


Don't know how and why this helps :-(







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