traceroute issues

[Roy Shiladitya]

Hi,
I have a situation where a 'traceroute' command works without a ' -I' option on a N Class box but on the RP7410/20 series i have to use the -I option. The route tables for both hosts are the same .
Does anyone have any ideas as to why ?

Thanks in advance.
Regards,
Roy

[Joseph Loo]

hi,

r both servers on 11i? also, r u using the same version of traceroute command for both the servers?

# what /usr/contrib/bin/traceroute

regards.

[Roy Shiladitya]

Hi Joseph,

Yes, both servers running 11i and also the same version of traceroute .

regards,
Roy

[Warren_9]

Hi,

on 11i, the traceroute will having problem when the server has multiple network interface. The "-i" option must use in server has mulitple interface.

is the N-Class only configured 1 interface and the RP7410 got mulitple interfaces?

[Roy Shiladitya]

Hi,

No both servers have only 1 interface configured .

I did a ifconfig on both the servers and the only difference that I could see is that the Interface on the RP7420 shows CKO ( checksum offset) as one of the flags whereas it does not on the N class.
And also the N class is a 10/100Base nic whereas the RP7420 is a 1000base nic.

Regards,
Roy

[Roy Shiladitya]

Sorry Warren,

When you mentioned one or multiple interfaces , did you mean interfaces present or configured ?

the N class has only 1 interface present and configured , whereas the RP7420 has 3 interfaces present and only 1 configured.

Roy

[Warren_9]

Sorry Roy, i'm not sure the un-configure interface will also affect the traceroute....

On my server, i got the following messages if i didn't use the "-i"

traceroute: Warning: has multiple addresses;
traceroute: Warning: Multiple interfaces found;

[Roy Shiladitya]

Warren,

In my case when I do a traceroute from the RP7420 server without a '-I ' it does nothing, not even warning message. Just sits on the same line, whereas from the N class it does all the 30 hops.
But when I do it with a ' -I ' it works fine.
At the firewall end when I check, I can see that the N class is sending ICMP packets to the firewall even withour the ' -I' option whereas in the RP7420 I have to force it to send ICMP packets using ' -I' .
Regards,
Roy

[Devesh Pant_1]

Roy,
are both the servers connected to different switches ? if yes, this could be a switch configuratiuon issue.
traceroute with a -I option uses (IPv4 only) This tells traceroute to use ICMPv4 ECHO instead of UDP datagrams.

There is nothing on the HP-UX side that is wrong I believe.

Hope this helps.
thanks
DP

[Roy Shiladitya]

Thanks Davesh ,

I thought so too ,yes they are conected to different switches, but wanted to check with the forum in case of any known issues,
I will check with the WAN guys regarding the switches..

Regards,
Roy

[Roy Shiladitya]

I think the problem was at the Network/switch level as pointed out by some forum users. Have passed on the feedback to the Networks team.