routing och ip alias

[Mattias Barthel]

Hej Busar,

 Jag försöker pinga mitt modem från FBSD maskin som har 2 tillsatta IP 
addresser.
Den första addressen blir tilldelad via dhcp från ISPn. Den andra sätter 
jag själv för att kunna
kommunicera med modemet. Av någon okänd anledning går detta inte.

Men om jag däremot bara sätter den andra addressen (10.0.0.1) så går det 
utmärkt.
Varför går detta inte?



$ arp -a
modem (10.0.0.138) at 00:15:e9:f9:53:17 on xl0 [ethernet]
? (10.255.255.255) at ff:ff:ff:ff:ff:ff on xl0 permanent [ethernet]
? (89.131.128.1) at 00:00:5e:00:01:03 on xl0 [ethernet]
? (89.131.143.255) at ff:ff:ff:ff:ff:ff on xl0 permanent [ethernet]
? (192.168.1.224) at 00:19:db:cc:7e:51 on fxp0 [ethernet]
? (192.168.1.230) at 00:16:76:da:ca:7a on fxp0 [ethernet]
? (192.168.1.231) at 00:1c:b3:7c:63:b6 on fxp0 [ethernet]
? (192.168.1.250) at 00:0a:e6:dd:a9:68 on fxp0 [ethernet]
? (192.168.1.253) at (incomplete) on fxp0 [ethernet]
? (192.168.1.255) at ff:ff:ff:ff:ff:ff on fxp0 permanent [ethernet]
$ netstat -rn
Routing tables

Internet:
Destination        Gateway            Flags    Refs      Use  Netif Expire
default            89.131.128.1       UGSc        9 10355450    xl0
10                 link#1             UC          2        0    xl0
10.0.0.138         00:15:e9:f9:53:17  UHLW        0       10    xl0   1169
10.255.255.255     ff:ff:ff:ff:ff:ff  UHLWb       2      246    xl0
89.131.128/20      link#1             UC          2        0    xl0
89.131.128.1       00:00:5e:00:01:03  UHLW        7        0    xl0    453
89.131.129.100     127.0.0.1          UGHS        0    31249    lo0
89.131.143.255     ff:ff:ff:ff:ff:ff  UHLWb       1      220    xl0
127.0.0.1          127.0.0.1          UH          3     3163    lo0
192.168.1          link#2             UC          6        0   fxp0
192.168.1.224      00:19:db:cc:7e:51  UHLW        1    11574   fxp0    654
192.168.1.230      00:16:76:da:ca:7a  UHLW        3   805452   fxp0   1152
192.168.1.231      00:1c:b3:7c:63:b6  UHLW        1   335508   fxp0    938
192.168.1.250      00:0a:e6:dd:a9:68  UHLW        0  5270271   fxp0   1139
192.168.1.253      link#2             UHLW        1       28   fxp0
192.168.1.255      ff:ff:ff:ff:ff:ff  UHLWb       3      170   fxp0
$
$
$
$ ping modem
PING modem (10.0.0.138): 56 data bytes
^C
--- modem ping statistics ---
2 packets transmitted, 0 packets received, 100% packet loss
$
$
$
$ ifconfig xl0
xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
        inet 89.131.129.100 netmask 0xfffff000 broadcast 89.131.143.255
        inet 10.0.0.1 netmask 0xff000000 broadcast 10.255.255.255
        ether 00:60:08:54:a8:6a
        media: Ethernet autoselect (100baseTX <full-duplex>)
        status: active
$