Avaya Managing Routers and BNX Platforms Manual de usuario Pagina 186

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Managing Routers and BNX Platforms
7-20 114083 Rev. A
Figure 7-12. Ping Does Not Respond Window
An “ICMP host unreachable from <y.y.y.y>” message appears if the router
whose address is y.y.y.y cannot forward the ping request any further along the
path to the target device. IP updates its IP routing or Address Resolution
Protocol (ARP) table accordingly. A sample message follows:
ping: ICMP host unreachable from 192.32.243.1
A target address “is unreachable” message appears if the router previously
issued an “ICMP host unreachable from <y.y.y.y>” message. Within
40 seconds, the router receives a subsequent ICMP echo request addressed to
the same target device. The ARP times out or the address is not resolved. A
sample message follows:
ping: 192.32.1.151 is unreachable
IPX Ping
When you issue an Internet Packet Exchange Protocol (IPX) ping, the router
sends an IPX configuration request packet to the remote IPX address that you
specify. If the remote device is listening on socket number 456h for an IPX
configuration request packet, it responds if it can be reached, and Site Manager
displays a message indicating that the device “is alive” or “does not respond.”
IPX configuration request packets are typically used to get configuration
information from other devices on a NetWare network. However, the router only
uses these packets to test the reachability of a remote device that listens for and
responds to IPX configuration request packets.
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