Date: Wed, 27 Oct 1999 07:19:11 -0400 From: "Chanderpaul, Pradesh" <Pradesh_Chanderpaul@stratus.com> To: "'questions@freebsd.org'" <questions@freebsd.org> Subject: IS: Network lost after replacing NIC - suspect routing Message-ID: <1D1A4EF7AD4DD211A80D00A0C9D7DB667E685B@exna1.stratus.com>
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Hello all
I seemed to have lost network connectivity after replacing my NIC.
My situation is this :-
- I installed FreeBSD 3-2.RELEASE with a working SMC Ultra
ethernet NIC. No problems here
- I replaced the NIC device with a 3COM 3C509 NIC. Same network
addresses as old NIC.
- The card is recognised at boot
ep0 at 0x300-0x30f irq 10 on isa
ep0: utp[*UTP*] address 00:60:08:7c:64:bd
- The card has a link light.
- I obtain similar results with and without link2 passed to ifconfig.
- The card is configured for TCP/IP (I've changed the actual addresses)
$ ifconfig ep0
ep0: flags=c843<UP,BROADCAST,RUNNING,SIMPLEX,LINK2,MULTICAST> mtu 1500
inet 111.222.333.44 netmask 0xffffff00 broadcast 111.222.333.255
ether 00:60:08:7c:64:bd
- I can ping the IP address defined on the card ok, so I deduce
the TCP stack is loaded.
$ ping 111.222.333.44
--- 111.222.333.44 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss
- However, I cannot reach the defined gateway.
$ ping 111.222.333.1
ping: sendto: Host is down
ping: sendto: Host is down
.
.
- The tail end of my rc.conf
ifconfig_ep0="inet 111.222.333.44 netmask 255.255.255.0"
defaultrouter="111.222.333.1"
hostname="sa-bsd-srv1.MYDOMAIN.COM"
router_enable="NO"
- I've noticed what I regard as strange (I may be wrong) routing behaviour
Take note of the following output.
THIS IS THE RESULT OF THE ROUTING TABLE IMMEDIATELY AFTER REBOOT
$ netstat -nr
Destination Gateway Flags Refs Use Netif
Expire
default 111.222.333.1 UGSc 0 0 ep0
<== OK HERE
^^^^^^^^^^^^^ === > MY DEFINED GATEWAY
127.0.0.1 127.0.0.1 UH 0 0 lo0
111.222.333 link#2 UC 0 0 ep0
111.222.333.1 link#2 UHLW 1 0 ep0
*** ^^^ **** === > SHOULD THIS BE HERE ???
I NOW PING THE IP ADDRESS DEFINED ON THE NIC.
$ ping 111.222.333.44
PING 111.222.333.44 (111.222.333.44): 56 data bytes
--- 111.222.333.44 ping statistics ---
3 packets transmitted, 3 packets received, 0% packet loss ===> OK
$ netstat -nr
Destination Gateway Flags Refs Use Netif
Expire
default 111.222.333.1 UGSc 0 0 ep0
127.0.0.1 127.0.0.1 UH 0 0 lo0
111.222.333 link#2 UC 0 0 ep0
111.222.333.1 link#2 UHLW 1 0 ep0
111.222.333.44 0:60:8:7c:64:bd UHLW 0 6 lo0
^^^^^^^^^^^^^^ === > CREATES NEW ROUTE AND USES THIS.
TRY PINGING THE DEFINED GATEWAY NOW
$ ping 111.222.333.1
PING 111.222.333.1 (111.222.333.1): 56 data bytes
ping: sendto: Host is down
ping: sendto: Host is down
--- 111.222.333.1 ping statistics ---
2 packets transmitted, 0 packets received, 100% packet loss <== 2
PACKECTS NOT OK
LOOKING AT THE ROUTING TABLE NOW
$ netstat -nr
Routing tables
Destination Gateway Flags Refs Use Netif
Expire
default 111.222.333.1 UGSc 0 0 ep0
127.0.0.1 127.0.0.1 UH 0 0 lo0
111.222.63 link#2 UC 0 0 ep0
111.222.333.1 link#2 UHLW 1 2 ep0
PACKETS SENT THROUGH THIS ROUTE === > ^^^
111.222.333.44 0:60:8:7c:64:bd UHLW 0 6 lo0
TRY ANOTHER HOST IN THE NETWORK
PING 111.222.333.39 (111.222.333.39): 56 data bytes
--- 111.222.333.39 ping statistics ---
5 packets transmitted, 0 packets received, 100% packet loss <== 5
PACKETS NOT OK
$ netstat -nr
Destination Gateway Flags Refs Use Netif
Expire
default 111.222.333.1 UGSc 0 0 ep0
127.0.0.1 127.0.0.1 UH 0 0 lo0
111.222.333 link#2 UC 0 0 ep0
111.222.333.1 link#2 UHLW 1 2 ep0
111.222.333.39 link#2 UHLW 0 5 ep0
^^^ CREATED ANOTHER ROUTE INSTEAD OF USING DEFAULT
111.222.333.44 0:60:8:7c:64:bd UHLW 0 6 lo0
I'll appreciate any assistance. I'd also appreciate being copied
on the results as I'm not allowed newsgroup subscriptions on
this email address.
Thanking you in advance.
===============================================================
Pradesh Chanderpaul Phone: +27 12 663 3260/6
Stratus Computer Systems FAX : +27 12 663 3281
South Africa CAC
Email: Pradesh_Chanderpaul@stratus.com
<mailto:Pradesh_Chanderpaul@stratus.com>
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