Table C3-16. Fields Displayed By The Ping -T Option - Bay Networks 5390 Administering

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Using the CLI Commands

Using the information carried in the outbound packet, along with the return packet and the traceroute

messages, ping –t displays the path of the packets and the characteristics of the routing interfaces

along the way and back. And, if a packet cannot be forwarded, ping –t locates the failure.

Table C3-16 describes the ﬁelds displayed by ping –t.

The sample topology shown in Figure C3-2 is assumed by the ping –t examples that follow it.

Table C3-16. Fields Displayed by the ping –t Option

The direction in which the ICMP packet is heading. The

>>> symbols indicate an outbound packet heading towards

the ping –t destination. The <<< symbols indicate a return

packet heading back towards the ping –t source. The ***

symbols indicate that a router could not forward the packet.

In this case, the router discards the packet and ping –t

The IP address of the router interface over which the

outbound or return packet was forwarded.

The number of routers that the outbound or return packet

has crossed. If the count skips a hop (for example, goes

from 4 to 6), a traceroute message was lost, probably due to

network congestion.

The speed, in bits per second, of the interface over which

the outbound or return packet was forwarded. If the packet

could not be forwarded, ping –t displays a zero in this ﬁeld.

The maximum transmission unit (in bytes) of the interface

over which the outbound or return packet was forwarded.

The MTU is the largest packet size the interface can forward

without fragmenting the packet. If the packet cannot be

forwarded because its size exceeds the MTU and its header

indicates not to fragment, ping –t displays a zero in this