Date: Thu, 10 Jan 2002 19:58:02 -0500 From: "Dan Langille" <dan@langille.org> To: freebsd-questions@freebsd.org Subject: routing with PPPoE/DSL on a dual homed gateway Message-ID: <3C3DF24A.21937.6E5B5ED@localhost>
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Everythings working. AFAIK. It's all fine. It's just that I don't know
why it's working....
I have a new 4.5RC box with two nics (vr0 and xl0). I've been able to
get tun0 up and running via ppp. It has authenticated with my ISP
and has a public IP address. I have onc nic (xl0) on a 192.168.0.0
network. The vr0 NIC is connected to the DSL modem. At present,
it has no IP address. Yet I can ping out, get everywhere I need... I
don' t know how...
How it is that the routing works when vr0 does not have an IP address?
# traceroute yahoo.com
traceroute to yahoo.com (216.115.108.243), 64 hops max, 40 byte packets
1 10.10.240.1 (10.10.240.1) 255.904 ms 286.591 ms 305.575 ms
2 213.137.68.50 (213.137.68.50) 68.822 ms 71.950 ms 68.214 ms
etc
[root@mordif:/etc/ppp] # netstat -nr
Routing tables
Internet:
Destination Gateway Flags Refs Use Netif
Expire
default 10.10.240.1 UGSc 0 0 tun0
10.10.240.1 213.137.205.160 UH 1 0 tun0
127.0.0.1 127.0.0.1 UH 0 0 lo0
192.168.0 link#2 UC 3 0 xl0
192.168.0.18 0:50:bf:32:ad:ff UHLW 45 347 xl0
425
192.168.0.20 0:50:bf:17:70:13 UHLW 0 2 xl0
118
192.168.0.99 0:50:bf:32:47:f9 UHLW 2 948 xl0
1080
vr0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
inet6 fe80::250:baff:fe2b:57aa%vr0 prefixlen 64 scopeid 0x1
ether 00:50:ba:2b:57:aa
media: Ethernet autoselect (10baseT/UTP)
status: active
xl0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
options=3<rxcsum,txcsum>
inet 192.168.0.21 netmask 0xffffff00 broadcast 192.168.0.255
inet6 fe80::201:3ff:fe25:dab%xl0 prefixlen 64 scopeid 0x2
ether 00:01:03:25:0d:ab
media: Ethernet autoselect (100baseTX <full-duplex>)
status: active
tun0: flags=8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1492
inet6 fe80::250:baff:fe2b:57aa%tun0 prefixlen 64 scopeid 0x8
inet 213.137.205.160 --> 10.10.240.1 netmask 0xffffff00
Opened by PID 227
# more ppp.conf
default:
# set log Phase Chat LCP IPCP CCP tun command
set log Phase tun command
istop:
set device PPPoE:vr0:
set mru 1492
set mtu 1492
set speed sync
enable lqr
set lqrperiod 5
set cd 5
set dial
set login
set timeout 0
set authname myuserid
set authkey mypassword
set ifaddr 0 0
add default HISADDR
Yes, IP addresses have been changed to protect the kiddies.
--
Dan Langille
The FreeBSD Diary - http://freebsddiary.org/ - practical examples
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