(feature change request) remove link-layer generated routes from netstat -r

[Eugene Grosbein]

On Wed, Feb 22, 2006 at 03:50:17PM +0200, Nikos Vassiliadis wrote:

> netstat -r prints link-layer generated routes and many
> times the output becomes somehow obscure. For
> example:
> 
> root at brad:0:/usr/home/src/FreeBSD-6/src/usr.bin/netstat# netstat -ranfinet
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags    Refs      Use  Netif Expire
> default            10.1.1.244         UGS         0    31016    rl0
> 10.1.1/24          link#1             UC          0        0    rl0
> 10.1.1.181         00:0f:1f:fb:02:f5  UHLW        1        0    rl0
> 10.1.1.182         00:e0:fc:38:d4:40  UHLW        1        0    rl0
> 10.1.1.183         00:e0:fc:65:07:fd  UHLW        1        0    rl0
> 10.1.1.244         00:50:fc:fe:74:3b  UHLW        2        1    rl0
> 10.1.1.254         00:0c:cf:70:50:06  UHLW        1        0    rl0
> 127.0.0.1          127.0.0.1          UH          0     1117    lo0
> 192.168.1          link#5             UC          0        0   fxp0
> 192.168.1.25       00:05:5d:4d:19:58  UHLW        1        0   fxp0
> 192.168.1.45       00:11:43:b6:a1:55  UHLW        1        0   fxp0
> 192.168.1.71       00:0c:f1:b9:38:50  UHLW        1     1645   fxp0
> 192.168.1.84       00:04:23:af:79:66  UHLW        1        0   fxp0
> 192.168.1.112      00:30:4f:21:3b:8a  UHLW        1        0   fxp0
> 192.168.1.196      00:07:e9:40:1f:c5  UHLW        1        0   fxp0
> 192.168.1.199      00:e0:81:21:28:21  UHLW        1        0   fxp0
> 192.168.1.200      00:30:4f:03:88:03  UHLW        1        0   fxp0
> 
> 
> when the information I was actually looking for is:
> 
> root at brad:0:/usr/home/src/FreeBSD-6/src/usr.bin/netstat# netstat -rnfinet
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags    Refs      Use  Netif Expire
> default            10.1.1.244         UGS         0    31016    rl0
> 10.1.1/24          link#1             UC          0        0    rl0
> 127.0.0.1          127.0.0.1          UH          0     1117    lo0
> 192.168.1          link#5             UC          0        0   fxp0
> root at brad:0:/usr/home/src/FreeBSD-6/src/usr.bin/netstat# 
> 
> 
> The attachment patch ("cvs diff -u -rHEAD route.c" generated) prints
> link-layer generated routes when -a is specified and ignores them
> the rest of the time.
> 
> Thoughts? POLA violation?

Just use:

netstat -rn | awk '$3 !~ /L/ { print }'

Eugene