3Com WXR100 3CRWXR10095A - Manual (Page 257)

traceroute 257
The first row of the display indicates the target host, the maximum
number of hops, and the packet size. Each numbered row displays
information about one hop. The rows are displayed in the order in which
the hops occur, beginning with the hop closest to the WX switch.
The row for a hop lists the total time in milliseconds for each ICMP packet
to reach the router or host, plus the time for the ICMP Time Exceeded
message to return to the host.
An exclamation point (!) following any of these values indicates that the
Port Unreachable message returned by the destination has a maximum
hop count of 0 or 1. This can occur if the destination uses the maximum
hop count value from the arriving packet as the maximum hop count in
its ICMP reply. The reply does not arrive at the source until the destination
receives a traceroute packet with a maximum hop count equal to the
number of hops between the source and destination.
An asterisk (*) indicates that the timeout period expired before MSS
received a Time Exceeded message for the packet.
If Traceroute receives an ICMP error message other than a Time Exceeded
or Port Unreachable message, MSS displays one of the error codes
described in Table 41 instead of displaying the round-trip time or an
asterisk (*).
Table 41 describes the traceroute error messages.
See Also
„
ping on page 214
Table 41 Error messages for traceroute
Field Description
!N No route to host. The network is unreachable.
!H No route to host. The host is unreachable.
!P Connection refused. The protocol is unreachable.
!F Fragmentation needed but Do Not Fragment (DNF) bit was set.
!S Source route failed.
!A Communication administratively prohibited.
? Unknown error occurred.