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Solaris 9 - Unable to ping a particular server, traceroute also displays * * *

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Operating Systems Solaris Solaris 9 - Unable to ping a particular server, traceroute also displays * * *
# 1  
Old 03-18-2013
Oracle Solaris 9 - Unable to ping a particular server, traceroute also displays * * *
Hi All,

I am new to solaris environment and we are using Solaris 9

The problem is am unable to ping a particular server from from one of the solaris server

The traceroute also shows only * * * for all the 30 hops

I tried to check all the settings like
1) /etc/hosts -> contains the exact ip of the server to which am trying to ping
2) /etc/resolv.conf -. has the proper DNS
3) /etc/defaultrouter -> has the correct default router assigned
4) No firewall is set

Am able to ping other servers, but only unable to ping/ftp/telnet one and which is very important and necessary for me

Kindly guide me how to resolve the issue

Please let me know if more information is required on this

Thanks in advance for all your valuable suggestion and help

Regards,
Sanjay
# 2  
Old 03-18-2013
Is the netmask correct? Is the default router correct?
Code:
ifconfig ...
netstat -nr ...

On the particular server:
is netmask correct, and is default router correct?
does snoop show the incoming ICMP packet?
# 3  
Old 03-18-2013
Hi,

Please find the details below:-

The default router address is
Code:
:- 172.21.87.251

ifconfig -a

lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
bcme1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
        inet 172.21.87.148 netmask ffff0000 broadcast 172.21.255.255
        ether 0:16:35:6b:a4:14

netstat -nr 

Routing Table: IPv4
  Destination           Gateway           Flags  Ref   Use   Interface
-------------------- -------------------- ----- ----- ------ ---------
172.21.0.0           172.21.87.148        U         1   7763  bcme1
224.0.0.0            172.21.87.148        U         1      0  bcme1
default              172.21.87.251        UG        1    400
127.0.0.1            127.0.0.1            UH        3   2820  lo0

And snoop also shows the incoming packets

Let me know if more information is required

Thanks & Regards,
Sanjay
Last edited by jim mcnamara; 03-22-2013 at 08:51 AM..
# 4  
Old 03-18-2013
I asked to do it twice
1. ifconfig/netstat on the "solaris server"
2. ifconfig/netstat/snoop on the "particular server"
# 5  
Old 03-18-2013
check whether the ftp and telnet services are online
#svcs -a|grep ftp
#svcs -a|grep telnet

if they are offline , make them online using svcadm commands...

for more information , check the /var/adm/messages file....

Also check whether the IP address is up in both systems,,,,,, using #ifconfig -a

If they go down, make them up again.......

Good luck
# 6  
Old 03-19-2013
Hi All,

Please find the below details

Server A wants to communicate to server B
Server A is unable to even ping server B

We have a server C which is able to communicate with both server A and B and vice versa

All these servers are of Solaris 9

Server A details:-
Code:
lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
bcme1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3
        inet 172.21.87.148 netmask ffff0000 broadcast 172.21.255.255
        ether 0:16:35:6b:a4:14

netstat o/p:-
TCP: IPv4
   Local Address        Remote Address    Swind Send-Q Rwind Recv-Q  State
-------------------- -------------------- ----- ------ ----- ------ -------
Server A.telnet 10.242.137.197.61650 65792      1 66346      0 ESTABLISHED

Server B details:-

ifconfig -a
o0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1
        inet 127.0.0.1 netmask ff000000
bcme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2
        inet 172.21.36.202 netmask ffffff00 broadcast 172.21.36.255

netstat 

TCP: IPv4
   Local Address        Remote Address    Swind Send-Q Rwind Recv-Q  State
-------------------- -------------------- ----- ------ ----- ------ -------
Server B.telnet         10.242.137.197.61733 65024      1 66346      0 ESTABLISHED

All the ftp and telnet services are up and running

Server A is able to communicate with other solaris server

The snoop output is huge do let me know if I need to paste the whole output

Please let me know if any further information is required

Thanks & Regards,
Sanjay
Moderator's Comments:
Mod Comment Please use code tags
Last edited by jim mcnamara; 03-22-2013 at 08:52 AM..
# 7  
Old 03-19-2013
Of course you should filter for ping=ICMP
Code:
serverB# snoop icmp

I guess that serverA has got a wrong netmask:
Quote:
inet 172.21.87.148 netmask ffff0000 broadcast 172.21.255.255
and serverC has got 172.21.87.x so is directly reachable.
Please ask your LAN guys for the correct netmask.
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