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Managing Serial Networks Using UUCP and PPP in Oracle® Solaris 11.4

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Updated: November 2020
 
 

Common Network Problems That Affect PPP

You can use the messages that are generated by netstat -s to fix the following network problems. For related procedural information, refer to How to Diagnose Network Problems.

ICMP input destination unreachable

Cause:  The local host is missing a route.

Solution:  Add the missing route to the local host's routing tables.

ICMP time exceeded

Cause:  Two routers are forwarding the same destination address to each other, causing the packet to bounce back and forth until the time-to-live (TTL) value is exceeded.

Solution:  Use traceroute to find the source of the routing loop, and then contact the administrator of the router in error. For information about traceroute, refer to the traceroute(8) man page.

IP packets not forwardable

Cause:  The local host is missing a route.

Solution:  Add the missing route to the local host's routing tables.