Originally posted by: apple08

Dear AIX gurus,
How can i delete the unwanted ip permanently from the routing table even after restart the server? last time i use smit route and delete it.
i heard something like to soft delete and the unwanted ip will come back again after the server restart.

looking forward for your awaiting reply. many thanks in advance
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Originally posted by: tony.evans

If you delete the static route (which I assume is what you're talking about) from smit, then it will remove it from the ODM as well and it won't come back post-reboot.

However, if someone has added route commands to some rc files (like a route add) then it'll come back after every reboot until you find it.

Not really 100% sure what you're asking, hope that helps.
#AIX-Forum

Originally posted by: apple08

Dear AIX Gurus,
that's really help.
how can i find the file? can we remove permanently the unwanted entry in th rc file in order to ensure this unwanted route in not come back again after server reboot.
i don't know who has added the unwanted route in our server. tahnks a lot
#AIX-Forum

Originally posted by: ostost

AIX stores the static routes in the inet0 device. You can display it using the lsattr command like in the example below.

# lsattr -El inet0
authm 65536 Authentication Methods True
bootup_option no Use BSD-style Network Configuration True
gateway Gateway True
hostname virtlpar04 Host Name True
rout6 IPv6 Route True
route net,-hopcount,0,,0,111.111.111.111 Route True
route net,-hopcount,0,,0,192.37.20.1 Route True

If you wanted to delete the default route through gateway 111.111.111.111 shown in this example you would have to run the following chdev comamand (paste the route as it is display in the lsattr output).

# chdev -l inet0 -a delroute="net,-hopcount,0,,0,111.111.111.111"
inet0 changed

Sometimes the routes are also set through a script which is called from the inittab. In this case do an lsitab -a and verify the scripts called there.

Message was edited by: ostost
#AIX-Forum

Originally posted by: apple08

after i delete using smit route, i restarted the server the route come back again. how can i delete permanently. i wanted to delete en3 (10.10.10.10 and 10.10.10/24)
looking 4ward for your awaiting reply. thanks in advance

1. netstat -rn

Routing tables
Destination Gateway Flags Refs Use If Exp Groups

Route Tree for Protocol Family 2 (Internet):
default 10.103.0.1 UG 9 2756752 en2 - -
10.1.0.0 10.1.1.3 UHSb 0 0 en0 - - =>
10.1/16 10.1.1.3 U 1 474375 en0 - -
10.1.1.3 127.0.0.1 UGHS 0 64113 lo0 - -
10.1.255.255 10.1.1.3 UHSb 0 29 en0 - -
10.2.0.0 10.2.1.3 UHSb 0 0 en2 - - =>
10.2/16 10.2.1.3 U 2 451219 en2 - -
10.2.1.3 127.0.0.1 UGHS 0 99407 lo0 - -
10.2.255.255 10.2.1.3 UHSb 0 27 en2 - -
10.10.10.0 10.10.10.10 UHSb 0 0 en3 - - =>
10.10.10/24 10.10.10.10 U 0 2368 en3 - -
10.10.10.10 127.0.0.1 UGHS 0 5 lo0 - -
10.10.10.255 10.10.10.10 UHSb 0 1 en3 - -
10.103.0.0 10.103.1.44 UHSb 0 0 en2 - - =>
10.103/16 10.103.1.44 U 15 1907436 en2 - -
10.103.1.44 127.0.0.1 UGHS 0 0 lo0 - -
10.103.1.45 127.0.0.1 UGHS 0 13 lo0 - -
10.103.255.255 10.103.1.44 UHSb 0 0 en2 - -
127/8 127.0.0.1 U 14 378475 lo0 - -

Route Tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 - -
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Originally posted by: IBMFORUMS

what is your "ifconfig -a" output?
#AIX-Forum

Originally posted by: apple08

Dear AIX guru,
the output of ifoconfig -a is:

1. ifconfig -a

en0: flags=5e080863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),PSEG,LARGESEND,CHAIN>
inet 10.1.1.3 netmask 0xffff0000 broadcast 10.1.255.255
tcp_sendspace 131072 tcp_recvspace 65536
en2: flags=5e080863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),PSEG,LARGESEND,CHAIN>
inet 10.2.1.3 netmask 0xffff0000 broadcast 10.2.255.255
inet 10.103.1.45 netmask 0xffff0000 broadcast 10.103.255.255
inet 10.103.1.44 netmask 0xffff0000 broadcast 10.103.255.255
tcp_sendspace 131072 tcp_recvspace 65536
en3: flags=5e080863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),PSEG,LARGESEND,CHAIN>
inet 10.10.10.10 netmask 0xffffff00 broadcast 10.10.10.255
tcp_sendspace 131072 tcp_recvspace 65536
lo0: flags=e08084b<UP,BROADCAST,LOOPBACK,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT>
inet 127.0.0.1 netmask 0xff000000 broadcast 127.255.255.255
inet6 ::1/0
tcp_sendspace 131072 tcp_recvspace 131072 rfc1323 1
#AIX-Forum

Originally posted by: orphy

If you don't need en3 anymore, try removing en3 using "smitty rminet" and then a reboot to see if it goes away. If not, you have more investigations to do.

Orphy
#AIX-Forum

Originally posted by: apple08

dear AIX Guru,
we wanted to delete one entry.the network card is being used by others. last time i deleted using smit route and # route delete, but it come back again after we restarted the server. can we delete it the entry permanently. hope to hear frm you. thanks a lot
#AIX-Forum

Originally posted by: orphy

I'm somewhat confused and I might be missing something. It seems to me that you are trying to delete a route that is used by others. When you configure en3 to have that IP, AIX will create a route in the routing table for you. You typically can't get to these "others" from this AIX box without the entry in the routing table (at least not without wasting additional network bandwidth).

If you have a special routing need, you can add your own "route add/delete" command in a script and call it from inittab. Some people put entries in /etc/rc.net which I don't recommend. Should you want to deal with inittab, please beware that a corrupted inittab could render your AIX box to be un-bootable so be careful.

Orphy
#AIX-Forum

Originally posted by: apple08

thank you. very great reply. how to edit the rc.net file? i can see default gateway entries, but it involves scripting entries. how can i edit this file. attached is the rc.net file i get from our aix server. hope to hear from you. thank you
#AIX-Forum

Originally posted by: orphy

Like I said previously, I don't recommend you changing rc.net. If it more so now that you have issue doing the editing but if you must, try vi or any text editor (Emacs, Pico, etc). It's nothing more than a plain text file. How do you usually edit AIX text files? You simply do it the same way.

Orphy
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Originally posted by: IBMFORUMS

if you have ent3 configured in your system, you see an entry in routing table.

if you wana get rid of the ent3, use smit chinet.

or better:

rmdev -dl en3
rmdev -dl ent3
cfgmgr

but remember this will remove the whole configuration of ent3 in the odm.
#AIX-Forum

Originally posted by: SystemAdmin

Ok, I am experiencing the same type of issue. When someone configured our server, he accidentally typed in 172.24.255.255 as the gateway during initial setup.
These entries are all before the route delete command being run
netstat -r:
Route Tree for Protocol Family 2 (Internet):
default 172.24.20.1 UGc 0 0 en0 - - -
10.1.30.12 172.24.20.1 UGHW 0 1 en0 - - -
127/8 localhost U 4 247 lo0 - - -
172.24.0.0 wdsvista UHSb 0 0 en0 - - - =>
172.24/16 wdsvista U 5 721 en0 - - -
wdsvista localhost UGHS 5 71 lo0 - - -
172.24.255.255 wdsvista UHSb 0 1 en0 - - -
We have run the route delete 172.24.255.255 wdsvista, and the entry seems to go away but when I reboot the system, the entry remanifests itself. Running ifconfig -a:
en0: flags=5e080863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),PSEG,CHAIN>
inet 172.24.30.237 netmask 0xffff0000 broadcast 172.24.255.255

Here are the entries after trying to clean-up:
route delete 172.24.255.255 wdsvista
Route Tree for Protocol Family 2 (Internet):
default 172.24.20.1 UGc 0 0 en0 - - -
wfsnt36.westcorp.c 172.24.20.1 UGHW 1 50 en0 1500 - -
127/8 localhost U 5 267 lo0 - - -
172.24.0.0 wdsvista UHSb 0 0 en0 - - - =>
172.24/16 wdsvista U 3 863 en0 - - -
wdsvista localhost UGHS 5 71 lo0 - - -

Route Tree for Protocol Family 24 (Internet v6):
::1 ::1 UH 0 0 lo0 16896 - -

1. ifconfig -a

en0: flags=5e080863,c0<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),PSEG,CHAIN>
inet 172.24.30.237 netmask 0xffff0000 broadcast 172.24.255.255
tcp_sendspace 131072 tcp_recvspace 65536

**It is still showing up incorrectly in the ifconfig -a table.**

Message was edited by: rteeter
#AIX-Forum

Originally posted by: j.gann

AIX routing is different from other unixes. When you configure IP on an interface, you get some routing table entries as an extra bonus. These are 2 broadcast routes and 1 loopback route, which help aix to optimize networking (MTU size e.g.). There used to be a good document called "Two noticeable routing changes" on the IBM site, but not so anymore.

It makes no sense to try and delete these routes.
Regards
Joachim

Example:
en1: flags=1e080863,480<UP,BROADCAST,NOTRAILERS,RUNNING,SIMPLEX,MULTICAST,GROUPRT,64BIT,CHECKSUM_OFFLOAD(ACTIVE),CHAIN>
inet 172.29.176.68 netmask 0xffffff00 broadcast 172.29.176.255

172.29.176.0 172.29.176.68 UHSb 0 0 en1 - - =>
172.29.176/24 172.29.176.68 U 3 667 en1 - -
172.29.176.68 127.0.0.1 UGHS 0 1 lo0 - -
172.29.176.255 172.29.176.68 UHSb 0 4 en1 - -

UHSb is for "broadcast routes", the lo0 route is a loopback route

Message was edited by: j.gann
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Originally posted by: SystemAdmin

I have seen this same problem before. Usually you can resolve this by following the suggestion in reply #4 of this thread.
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