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RE: FW: ECOS: Free BSD - Default gateway entry , duplicate ARP//llinfo entries -
- From: "Alok Singh" <aloks at broadcom dot com>
- To: "Laurie Gellatly" <laurie dot gellatly at netic dot com>, <ecos-discuss at ecos dot sourceware dot org>
- Date: Tue, 31 Jul 2007 20:09:04 +0530
- Subject: RE: [ECOS] FW: [ECOS] ECOS: Free BSD - Default gateway entry , duplicate ARP//llinfo entries -
- References: <OBEELMDOHGDFDEMJCJCJKEPCMAAA.laurie.gellatly@netic.com>
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!!
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
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and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
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and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss