Dynamic routes...?

[Orlando De Oliveira R]

Hi,

I have a team HP9000 D390 with HP-UX 10.20. This team creating dynamic routes. I don't use DNS and the demons GATED, RDPD, RIP ...etc is disabled.

Because these dynamic routes are believed?

I remit them seen of the command netstat -r"

Routing tables
Destination Gateway Flags Refs Use Interface Pmtu PmtuTime
servfact localhost UH 126250441412 lo0 4608
lrc 10.4.1.6 UGHD 0 7578 lan0 1500
10.4.2.65 10.4.1.6 UGHD 0 19 lan0 1500
10.4.2.100 10.4.1.6 UGHD 0 528 lan0 1500
10.4.2.218 10.4.1.6 UGHD 0 17 lan0 1500
10.4.2.223 10.4.1.6 UGHD 0 3589 lan0 1500
servtrx 10.4.1.2 UGHD 0 3985 lan0 1500
trx 10.4.1.2 UGHD 0 1722 lan0 1500
10.4.4.25 10.4.1.2 UGHD 3 6183 lan0 1500
10.4.4.224 10.4.1.2 UGHD 4 28302 lan0 1500
servval 10.4.1.6 UGHD 0 9952 lan0 1500
10.4.5.134 10.4.1.6 UGHD 0 3 lan0 1500
servbqm 10.4.1.6 UGHD 0 10628 lan0 1500
servmbo 10.4.1.6 UGHD 0 9117 lan0 1500
contmbo 10.4.1.6 UGHD 0 39 lan0 1500
servscr 10.4.1.2 UGHD 0 18986 lan0 1500
servpto 10.4.1.6 UGHD 0 13745 lan0 1500
10.4.9.55 10.4.1.6 UGHD 0 12 lan0 1500
servplc 10.4.1.6 UGHD 0 3500 lan0 1500
servmat 10.4.1.2 UGHD 0 19215 lan0 1500
contmat 10.4.1.2 UGHD 0 8 lan0 1500
10.4.11.60 10.4.1.2 UGHD 0 29 lan0 1500
servplm 10.4.1.2 UGHD 0 12844 lan0 1500
contplm 10.4.1.2 UGHD 0 6 lan0 1500
servbar 10.4.1.2 UGHD 0 31500 lan0 1500
servaca 10.4.1.2 UGHD 0 13313 lan0 1500
servmcy 10.4.1.2 UGHD 0 12202 lan0 1500
10.4.26.64 10.4.1.2 UGHD 0 1 lan0 1500
localhost localhost UH 0 957 lo0 4608
default 10.4.1.54 UG 46 2559893 lan0 1500
10.4.1 servfact U 2430419931 lan0 1500

Thanks,

Orlando

[Duncan Edmonstone · Accepted solution]

Hi Orlando,

The 'D' flag gives away what these are.

These routes are all the result of 'ICMP redirects'

That is, initially your server was connecting to all these systemns through your default gateway (10.4.1.54), but that gateway reckons it knows better and more efficient ways to reach the destination than through itself (this implies there are other routers on the same subnet as your host), so it sends an ICMP redirect to your system and it updates its routing table accordingly.

These aren't necesarily anything to worry about. You can talk to your network team about this and just check that the router is behaving as it should, otherwise you can safely ignore them.

HTH

Duncan