[ECOS] FW: [ECOS] ECOS: Free BSD - Default gateway entry , duplicate ARP//llinfo entries -

Gary Thomas gary@mlbassoc.com
Tue Jul 31 17:55:00 GMT 2007


-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Alok Singh wrote:
> Gary,
> Is it possible for you to send me a dump of arp table (using
> db_show_arptab() or through some other means) before pinging to
> 204.133.123.27, and after pinging to
> 204.133.123.27 please!!

That function is only in the old (OpenBSD) stack.
[gthomas@hermes packages]$ find net -name "*.c" | xargs grep show_arp
net/tcpip/current/src/sys/netinet/if_ether.c: * Use this from ddb:  "call db_show_arptab"
net/tcpip/current/src/sys/netinet/if_ether.c:db_show_arptab()

Aren't you using the FreeBSD stack (the default and indeed, the only
supported BSD stack)?

> 
> regards,
> Alok
> 
> -----Original Message-----
> From: ecos-discuss-owner@ecos.sourceware.org
> [mailto:ecos-discuss-owner@ecos.sourceware.org] On Behalf Of Gary Thomas
> Sent: Tuesday, July 31, 2007 8:38 PM
> To: Alok Singh
> Cc: ecos-discuss@ecos.sourceware.org
> Subject: Re: [ECOS] FW: [ECOS] ECOS: Free BSD - Default gateway entry ,
> duplicate ARP//llinfo entries -
> 
> Alok Singh wrote:
>> Laurie,
> 
>> When I ping to box IP (10.240.3.156), I see that the src mac address
> in
>> the echo reply from the box has the correct mac address. Also I'm able
>> to access the DUT via all means(HTTP, telnet). The problem comes only
>> when the routing table search results in default route(10.240.3.1).  I
>> see duplicate arp entries in the routing table below. The one that to
>> which default rtentry points to (gwroute=0x805f8c40) has mac address
> as
>> 0 for 10.240.3.1. And at the same time, we have another mac entry for
>> 10.240.3.1 that has mac correctly installed(rtentry=0x805f89c0). This
> is
>> creating problem. 
> 
>> I don't deny that it might be happening because of some wrong
>> configuration from my side.  
> 
>> Can somebody give me a dump of the ECOS Free BSD routing table of a
>> working box by using command "show_network_tables" please!!
> 
> 
> Here's the output from the standard ping test, modified to show
> the network tables.  I also forced the second host to be one that
> required going to a different network (via the gateway).  It all
> seems to work just fine for me.  Note: the network tables look
> pretty much as yours do.
> 
> Start PING test
> [eth_drv_ioctl] Warning: Driver can't set multi-cast mode
> [eth_drv_ioctl] Warning: Driver can't set multi-cast mode
> BOOTP[eth0] op: REQUEST
>        htype: Ethernet
>         hlen: 6
>         hops: 0
>          xid: 0x5ad53233
>         secs: 0
>        flags: 0x8000
>        hw_addr: 00:08:e5:11:32:33
>      client IP: 0.0.0.0
>          my IP: 192.168.1.239
>      server IP: 192.168.1.101
>     gateway IP: 0.0.0.0
>   options:
>         DHCP message: 3 REQUEST
>         DHCP server id: 192.168.1.101
>         DHCP time 51: 3600
>         DHCP time 58: 1800
>         DHCP time 59: 3150
>         subnet mask: 255.255.255.0
>             gateway: 192.168.1.101
>       domain server: 192.168.1.101, 204.133.123.27, 206.168.216.4
>         domain name: chez-thomas.org
>        IP broadcast: 192.168.1.255
>         DHCP option: 37/55.9: 54 51 58 59 1 3 6 15 28
>         DHCP option: 39/57.2: 576
>         DHCP requested ip: 192.168.1.239
> [eth_drv_ioctl] Warning: Driver can't set multi-cast mode
> [eth_drv_ioctl] Warning: Driver can't set multi-cast mode
> [eth_drv_ioctl] Warning: Driver can't set multi-cast mode
> Routing tables
> Destination     Gateway         Mask            Flags    Interface
> 0.0.0.0         192.168.1.101   0.0.0.0         UG       eth0
> 127.0.0.0       127.0.0.1       255.0.0.0       UG       lo0
> 127.0.0.1       127.0.0.1                       UH       lo0
> 192.168.1.0     192.168.1.0     255.255.255.0   U        eth0
> Interface statistics
> eth0    IP: 192.168.1.239, Broadcast: 192.168.1.255, Netmask:
> 255.255.255.0
>         UP BROADCAST RUNNING MULTICAST MTU: 1500, Metric: 0
>         Rx - Packets: 0, Bytes: 0, Tx - Packets: 0, Bytes: 0
> lo0     IP: 127.0.0.1, Broadcast: 127.0.0.1, Netmask: 255.0.0.0
>         UP LOOPBACK RUNNING MULTICAST MTU: 16384, Metric: 0
>         Rx - Packets: 0, Bytes: 0, Tx - Packets: 0, Bytes: 0
> PING server 192.168.1.101 from 192.168.1.239
> 64 bytes from 192.168.1.101: icmp_seq=0, time=0ms
> 310 bytes from 192.168.1.101: icmp_seq=1, time=0ms
> 556 bytes from 192.168.1.101: icmp_seq=2, time=0ms
> 802 bytes from 192.168.1.101: icmp_seq=3, time=10ms
> 1048 bytes from 192.168.1.101: icmp_seq=4, time=0ms
> 1294 bytes from 192.168.1.101: icmp_seq=5, time=0ms
> 1540 bytes from 192.168.1.101: icmp_seq=6, time=0ms
> 1786 bytes from 192.168.1.101: icmp_seq=7, time=0ms
> 2032 bytes from 192.168.1.101: icmp_seq=8, time=0ms
> 2278 bytes from 192.168.1.101: icmp_seq=9, time=0ms
> 2524 bytes from 192.168.1.101: icmp_seq=10, time=0ms
> 2770 bytes from 192.168.1.101: icmp_seq=11, time=10ms
> 3016 bytes from 192.168.1.101: icmp_seq=12, time=0ms
> 3262 bytes from 192.168.1.101: icmp_seq=13, time=10ms
> 3508 bytes from 192.168.1.101: icmp_seq=14, time=0ms
> 3754 bytes from 192.168.1.101: icmp_seq=15, time=0ms
> Sent 16 packets, received 16 OK, 0 bad
> PING server 204.133.123.27 from 192.168.1.239
> 64 bytes from 204.133.123.27: icmp_seq=0, time=0ms
> 310 bytes from 204.133.123.27: icmp_seq=1, time=0ms
> 556 bytes from 204.133.123.27: icmp_seq=2, time=0ms
> 802 bytes from 204.133.123.27: icmp_seq=3, time=0ms
> 1048 bytes from 204.133.123.27: icmp_seq=4, time=0ms
> 1294 bytes from 204.133.123.27: icmp_seq=5, time=0ms
> 1540 bytes from 204.133.123.27: icmp_seq=6, time=0ms
> 1786 bytes from 204.133.123.27: icmp_seq=7, time=0ms
> 2032 bytes from 204.133.123.27: icmp_seq=8, time=0ms
> 2278 bytes from 204.133.123.27: icmp_seq=9, time=0ms
> 2524 bytes from 204.133.123.27: icmp_seq=10, time=0ms
> 2770 bytes from 204.133.123.27: icmp_seq=11, time=0ms
> 3016 bytes from 204.133.123.27: icmp_seq=12, time=0ms
> 3262 bytes from 204.133.123.27: icmp_seq=13, time=0ms
> 3508 bytes from 204.133.123.27: icmp_seq=14, time=10ms
> 3754 bytes from 204.133.123.27: icmp_seq=15, time=0ms
> Sent 16 packets, received 16 OK, 0 bad
> PASS:<Ping test OK>
> EXIT:<done>
> 
>> regards,
>> Alok
> 
>> -----Original Message-----
>> From: ecos-discuss-owner@ecos.sourceware.org
>> [mailto:ecos-discuss-owner@ecos.sourceware.org] On Behalf Of Laurie
>> Gellatly
>> Sent: Tuesday, July 31, 2007 3:24 AM
>> To: ecos-discuss@ecos.sourceware.org
>> Subject: RE: [ECOS] FW: [ECOS] ECOS: Free BSD - Default gateway entry
> ,
>> duplicate ARP//llinfo entries -
> 
>> Alok,
>> I'm concerned at this:
>> Destination     Gateway         Mask            Flags    Interface
>> ..
>> 10.240.3.0      10.240.3.0      255.255.255.0   U        eth0     
>> ..
>> To me that says that the gateway is 10.240.3.0 but with a 
>> subnet of 255.255.255.0 that address is the network address and NOT
>> a valid host address. In my books, either the address or the mask
>> must be wrong.
> 
>> I'd also be worried if you have a 0 MAC address as well.
>> They'd be the areas I'd look at.
> 
>> 			...Laurie:{)
> 
>> -----Original Message-----
>> From: ecos-discuss-owner@ecos.sourceware.org
>> [mailto:ecos-discuss-owner@ecos.sourceware.org]On Behalf Of Alok Singh
>> Sent: Monday, 30 July 2007 9:31 PM
>> To: ecos-discuss@ecos.sourceware.org
>> Subject: [ECOS] FW: [ECOS] ECOS: Free BSD - Default gateway entry ,
>> duplicate ARP//llinfo entries -
> 
> 
>> Hi,
>> Any comments/hints/clues from routing experts out there!!
> 
>> regards,
>> Alok
>> -----Original Message-----
>> From: ecos-discuss-owner@ecos.sourceware.org
>> [mailto:ecos-discuss-owner@ecos.sourceware.org] On Behalf Of Alok
> Singh
>> Sent: Sunday, July 29, 2007 7:20 AM
>> To: ecos-discuss@ecos.sourceware.org
>> Subject: [ECOS] ECOS: Free BSD - Default gateway entry , duplicate
>> ARP//llinfo entries -
> 
>> Hi,
>> I'm using latest cvs code. This is the same issue I mentioned earlier,
>> where I'm not able to access the box from a different subnet. I
> debugged
>> the issue further, and I see two llinfo entries corresponding to the
>> default gateway. One is created as soon as the default routing entry
> is
>> configured.  This has mac address as "0".  Default gateway points to
>> this entry. When I ping from other network, then arp of gateway is
>> resolved. And this creates another entry in the routing table. But
>> default gateway routing entry is still pointing to the old one that
> ahs
>> mac address as 0. Hence for every ping, I see an ARP request going out
>> of the box. My GW is 10.240.3.1. I'm providing the ROUTE TREE dump
>> below. Please have a look. Look for key field in the the dump to see
> the
>> duplication. I've verified that for IP addresses other than G/W, only
>> one ARP entry is present( 10.240.3.136). MY box IP address
>> is:10.240.3.156. I've enabled the debugs in icmp_input, and I can see
>> that the imcp echo reply is being sent out to IP in different subnet- 
>> icmp_input from 10.240.10.236 to 10.240.3.156, len 40
>> icmp_input, type 8 code 0
>> icmp_send dst 10.240.10.236 src 10.240.3.156
>> *********************************************
>> Route tree for AF_INET
>> rtentry=0x805f8d10 flags=0x10003 refcnt=0 use=7 expire=0
>>  key=[16,2,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
>>  mask=[]
>>  gw=[16,2,0,0,10,240,3,1,128,60,139,80,128,33,93,72]
>>  ifp=0x805612d4 (dtl) ifa=0x805f8f30
>>   ifa_addr=[16,2,0,0,10,240,3,156,0,0,0,0,0,0,0,0]
>>   ifa_dsta=[16,2,0,0,10,240,3,255,0,0,0,0,0,0,0,0]
>>   ifa_mask=[7,0,0,0,255,255,255]
>>   flags=0x101, refcnt=5, metric=0
>>  genmask=[NULL] gwroute=0x805f8c40 llinfo=0x00000000
>> ------------
>> rtentry=0x805f8e90 flags=0x101 refcnt=3 use=0 expire=30
>>  key=[16,2,0,0,10,240,3,0,0,0,0,0,0,0,0,0]
>>  mask=[7,255,255,255,255,255,255]
> 
> gw=[54,18,0,1,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
>> 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
>>  ifp=0x805612d4 (dtl) ifa=0x805f8f30
>>   ifa_addr=[16,2,0,0,10,240,3,156,0,0,0,0,0,0,0,0]
>>   ifa_dsta=[16,2,0,0,10,240,3,255,0,0,0,0,0,0,0,0]
>>   ifa_mask=[7,0,0,0,255,255,255]=
>>   flags=0x101, refcnt=5, metric=0
>>  genmask=[NULL] gwroute=0x00000000 llinfo=0x00000000
>> --------------
>> rtentry=0x805f89c0 flags=0x20405 refcnt=0 use=0 expire=4029
>>  key=[16,2,0,0,10,240,3,1,0,0,0,0,0,0,0,0]
>>  mask=[NULL]
> 
> gw=[54,18,0,1,6,0,6,0,0,15,181,52,144,196,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
>> 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
>>  ifp=0x805612d4 (dtl) ifa=0x805f8f30
>>   ifa_addr=[16,2,0,0,10,240,3,156,0,0,0,0,0,0,0,0]
>>   ifa_dsta=[16,2,0,0,10,240,3,255,0,0,0,0,0,0,0,0]
>>   ifa_mask=[7,0,0,0,255,255,255]
>>   flags=0x101, refcnt=5, metric=0
>>  genmask=[NULL] gwroute=0x00000000 llinfo=0x805f8940
>>   la_rt=0x805f89c0 la_hold=0x00000000, la_asked=0x0
>> ----------------------
>> rtentry=0x805f8c40 flags=0x2040d refcnt=1 use=0 expire=2999
>>  key=[16,2,0,0,10,240,3,1,128,60,139,80,128,33,93,72]
>>  mask=[NULL]
> 
> gw=[54,18,0,1,6,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
>> 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
>>  ifp=0x805612d4 (dtl) ifa=0x805f8f30
>>   ifa_addr=[16,2,0,0,10,240,3,156,0,0,0,0,0,0,0,0]
>>   ifa_dsta=[16,2,0,0,10,240,3,255,0,0,0,0,0,0,0,0]
>>   ifa_mask=[7,0,0,0,255,255,255]
>>   flags=0x101, refcnt=5, metric=0
>>  genmask=[NULL] gwroute=0x00000000 llinfo=0x805f8ba0
>>   la_rt=0x805f8c40 la_hold=0x80605e80, la_asked=0x0
>> ------------
>> rtentry=0x805f8ae0 flags=0x20405 refcnt=0 use=5 expire=1233
>>  key=[16,2,0,0,10,240,3,136,0,0,0,0,0,0,0,0]
>>  mask=[NULL]
> 
> gw=[54,18,0,1,6,0,6,0,0,20,42,44,68,86,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
>> ,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]
>>  ifp=0x805612d4 (dtl) ifa=0x805f8f30
>>   ifa_addr=[16,2,0,0,10,240,3,156,0,0,0,0,0,0,0,0]
>>   ifa_dsta=[16,2,0,0,10,240,3,255,0,0,0,0,0,0,0,0]
>>   ifa_mask=[7,0,0,0,255,255,255]
>>   flags=0x101, refcnt=5, metric=0
>>  genmask=[NULL] gwroute=0x00000000 llinfo=0x805f8a60
>>   la_rt=0x805f8ae0 la_hold=0x00000000, la_asked=0x0
> 
> 
> 
>> I'm getting the address/GW from DHCP server. My routing table after
>> configuring the IP address and GW is provided below. 
>> Routing tables
> 
>> Destination     Gateway         Mask            Flags    Interface
> 
>> 0.0.0.0         10.240.3.1      0.0.0.0         UG       eth0
>> 10.240.3.0      10.240.3.0      255.255.255.0   U        eth0     
> 
>> 127.0.0.0       127.0.0.1       255.0.0.0       UG       lo0      
> 
>> 127.0.0.1       127.0.0.1                       UH       lo0      
> 
>> Interface statistics
> 
>> Eth0    IP: 10.240.3.156, Broadcast: 10.240.3.255, Netmask:
>> 255.255.255.0
> 
>>         UP BROADCAST RUNNING MULTICAST MTU: 1500, Metric: 0
> 
>>         Rx - Packets: 100, Bytes: 19483, Tx - Packets: 12, Bytes: 720
> 
>> lo0     IP: 127.0.0.1, Broadcast: 127.0.0.1, Netmask: 255.0.0.0
> 
>>         UP LOOPBACK RUNNING MULTICAST MTU: 16384, Metric: 0
> 
>>         Rx - Packets: 0, Bytes: 0, Tx - Packets: 0, Bytes:
> 
> 
> 
> 
>> regards,
>> Alok
> 
> 
> 
> 

- --
- ------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
- ------------------------------------------------------------
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (GNU/Linux)
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org

iD8DBQFGr3eFmaKbSsQGV8ARAi++AJ4rmd/J6b8ZE6kDOidmwE+8ijdxagCgoyV2
9GMT2H8NZZmXecLxDXF8NNs=
=bXEU
-----END PGP SIGNATURE-----

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss



More information about the Ecos-discuss mailing list