Hi Laz,
1)In Given traceroute commands could you explore about probes:
R1#traceroute 192.168.3.1 probe 1
Type escape sequence to abort.
Tracing the route to 192.168.3.1
VRF info: (vrf in name/id, vrf out name/id)
1 192.168.12.2 0 msec
2 192.168.23.3 4 msec
3 192.168.3.1 0 msec
R1#traceroute 3.3.3.3
Type escape sequence to abort.
Tracing the route to 3.3.3.3
VRF info: (vrf in name/id, vrf out name/id)
1 * * *
2 * * *
3 * * *
Actually as per topic by default traceroute send 3 probes so in first one we have mentioned to use single probe but output of both seems ( forget about destination no reachable), i just want to know probe concept in both cases?
- I am also confused about TTL, actually the eg you used to explain this in which windows/Linux PC do ping for destination so as per first scenario where TTL=1 in ip packet sent by PC but R1 reply with TTL of 255 as well as when packet reaches to destination where we use TTL=4 & destination PC reply with TTL=125 how? I think it must reply with TTL=1 so my concern is that how is this happening and is TTL configurable b/c by default windows TTL is 128.