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Server x.x.3.105 255.255.0.0 can't ping x.x.1.200 but can ping x.x.1.100

Hello EE,
I have a weird one.  I have 2 servers
x.x.3.105
x.x.3.25
the first cannot ping x.x.1.200 but the second can.
The first CAN however ping x.x.1.100.

It is a switch so is not in DNS, but why am I unable to ping it?
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bergquistcompany
Asked:
bergquistcompany
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1 Solution
 
InfamusCommented:
Can you check the gateway IP for both servers?
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bergquistcompanyAuthor Commented:
same for both x.x.1.1
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InfamusCommented:
How about the subnet?
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Martin TarlinkNetwork Systems AdministratorCommented:
First check your network cable.
Second please tell us more about your network topology.
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bergquistcompanyAuthor Commented:
I have a parent domain but as far as IPs go there is no firewall.
The only firewall is at the perimeter.
The corporate facility uses a 172.16.x.x
We have other branches on other subnets but that is not relevant.
I have 2 servers in the parent domain trying to access a Cisco UCS in no domain actually as it acts as a switch.  It's IP is 172.16.1.200
Server one 172.16.3.105 cannot ping 172.16.1.200 subnet 255.255.0.0 172.16.1.1 gateway
Server two 172.16.3.25 can ping 172.16.1.200 subnet 255.255.0.0 172.16.1.1 gateway

I am baffled why as they are plugged into the same switch
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InfamusCommented:
can server 1 ping server 2?
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Martin TarlinkNetwork Systems AdministratorCommented:
I see you are using  16 bit network with mask 255.255.0.0 so all whose servers are in the same broadcast domain. Check network configuration on server and make sure you have set up 255.255.0.0 everywhere.

Also if your 172.16.1.1 is your gateway make sure you can ping to the gateway first.


If you can Run Wireshark on both servers and see what results you will see. It will tell you if ICMP is responding.
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ffleismaCommented:
on all the servers mentioned try to ping the gateway 172.16.1.1, can you provide feedback if all or only some can ping the gateway?

on the server that cannot ping the gateway, check the following

NIC status
check configuration of switchport where server is connected (the one that cannot ping the gateway most likely is in a different VLAN than the rest)

also, check the subnet and default gateway configured on all the devices.
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Craig BeckCommented:
If you try to ping from .3.105 to .1.200 can you see the IP-MAC in the ARP table on either device?
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bergquistcompanyAuthor Commented:
server 1 can ping server 2

Both can ping gateway

Confirmed both network settings are 255.255.0.0 and gateway is 172.16.1.1
They are both on vlan 1

I see the 1.200 in the ARP table on 3.25 but not on .3.125
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InfamusCommented:
can you do a tracert -d x.x.1.200 from x.x.3.105?

You are pinging by IP not the hostname, right?
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Martin TarlinkNetwork Systems AdministratorCommented:
It could be silly byt check Windows firewall. (if Linux do #iptables -L) and see if there is no any rule, or disable OS firewall on that servers.
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bergquistcompanyAuthor Commented:
tracert BQAPP1.bergquistcompany.com [10.10.3.105]  reports: Destination host unreachable
.

Yes by IP

No windows firewall
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InfamusCommented:
That is strange....

You verified that server 1 and server 2 are on the same vlan.

You verified that server 1 and server 2 has same subnet and default gateway.

Can you change the switchport which server 3.105 is connected?

You might also check if there's any IP conflict.
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bergquistcompanyAuthor Commented:
Same thing and no conflict
I'm confused!
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Craig BeckCommented:
Can you post the output from...

route print

...from each server?
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bergquistcompanyAuthor Commented:
wasn't in there was able to manually add it
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