Ping is a mechanism to see if a remote host is reachable via an IP network

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High ping times and packet loss on Alcatel-Lucent OmniSwitch 9600

We have 2 Alcatel 9600 core switches in a redundant configuration and 2 distribution switches (Alcatel 6850's) on another floor connected by fibre to the core switches. See the diagram below. Pinging ...
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2answers
35 views

How to manage PING replies? [on hold]

How can I manage, for example, my Ubuntu mashine so it doesn't (or does) respond to PING(ICMP ECHO_REQUEST - type 8) requests? Normally almost all computers in a LAN network responds to ping with an ...
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1answer
17 views

When the Service Base Filtering Engine is active, ping and Remote Dsktvp do not work

In a Windows Server 2008 R2 When the Service Base Filtering Engine (BFE) Running is a Ping and RDP are disabled and do not work. But when I disable the service is Both Ping and RDP work. What do ...
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1answer
21 views

domain does not have ping in CentOS VPS [on hold]

I have a VPS with CentOS 6.x, DirectAdmin control panel, and CSF. There are about 40 domains on it, but one of them did not load since yesterday (itgates.ir). When I ping this domain, is there not any ...
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2answers
28 views

what does `pipe <number>` mean in `ping` output?

While running a test to diagnose some alleged network problem, I got this output from ping: --- r01c01b11n02 ping statistics --- 30000 packets transmitted, 29995 received, 0% packet loss, time 6309ms ...
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1answer
33 views

“Destination Host Unreachable” and ARP returns no addresses over LAN

I am currently trying to setup LAN over two machines with a network mask of 255.255.255.0 however I am receiving the following message when trying to communicate between them both; [root@alpha ~]# ...
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1answer
52 views

Server not pinging even after setting gateway and ip

I am configuring an Icinga monitoring server. I am entirely new to Linux, so configuring after googling each and every bit. I have configured ip address, subnet mask and default gateway correctly. ...
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26 views

Very strange ping times [duplicate]

Since yesterday I get very strange ping times. Please have a look: root@serverek:~# ping onet.pl PING onet.pl (213.180.141.140) 56(84) bytes of data. 64 bytes from sg1.any.onet.pl (213.180.141.140): ...
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24 views

Network setup issue with no connection between virtual machines

I have the following network setup: EDIT: NOTE: WARNING: In the above Windows1 should have the ip 192.168.137.1 The issue that i am having is that every machine can ping and connect to every other ...
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1answer
66 views

Did you see similar icmp ever? [closed]

ping ya.ru PING ya.ru (213.180.193.3) 56(84) bytes of data. 64 bytes from www.yandex.ru (213.180.193.3): icmp_req=1 ttl=60 time=97.6 ms 64 bytes from www.yandex.ru (213.180.193.3): icmp_req=2 ttl=60 ...
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44 views

Windows 2012 R2 Server network fails intermittently

I have 2 windows 2012 R2 servers in a production environment. Both are VM's and configured same with the ip address as different. I haven't recieved alert of any kind of network failure for one ...
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2answers
198 views

Why do tracert latencies not add up to ping latency?

One might expect the sum of the tracert latencies to equal 267ms:
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23 views

Which Log file to check for strange Ubuntu server behaviour (offline for 5minutes at random times)

I am having problems with my Ubuntu 10.04.4 LTS server. My monitor application claims it goes off every morning at about 4 AM for 5 to 10 minutes. I am not sure where to start the troubleshooting ...
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52 views

OSX nslookup can resolve a lan hostname, but ping cannot? [closed]

I'm having an issue which recurs every few days, whereby ping cannot resolve a hostname on my LAN (but nslookup is able to). This is on OSX 10.9.2 (latest). The machine in this case is called ...
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2answers
327 views

What IP addresses to use for monitor the availability of Internet connection?

I would like to check the availability of Internet connectivity by sending ICMP "echo request" messages to some IPv4 addresses. Those IPv4 addresses should be as reachable as possible in stability ...
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2answers
37 views

Windows XP VMs on ESXis not pinging each other

I'm running a virual environment of this sort. There's a UCS box that has several VMs. I've setup 3 Virtual ESXi VMs and vCenter Server appliance. Using the appliance, I installed 3 WinXP VMs on the ...
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Why nslookup doesn't use mdns while ping do?

In dnsmasq.conf: address=/local/127.0.0.1 In resolv.conf: # Generated by NetworkManager domain example.com search example.com nameserver 127.0.0.1 nameserver 10.66.127.17 nameserver 10.68.5.26 I ...
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1answer
12 views

How to find vds/hosting with the best ping that I can have?

I'm living in tajikistan, and I want to purchase vps/dedicated server or at least good hosting outside of my country. One of important thing I want is to have a GOOD ping. For example ping to ...
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1answer
166 views

How to ping ipv6 interface

I'm trying to get familiar with ipv6 I don't understand why I can't ping this interface at the inet6 addr eth1 Link encap:Ethernet HWaddr 08:00:27:77:9e:77 inet addr:192.168.33.10 ...
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1answer
93 views

Bandwidth measurement using ping [closed]

How can I measure bandwidth using ping? I know I could use something like iperf on each end to do the measurement, but I can't do that because I don't have access to the remote system. Maybe if I ...
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27 views

Trace Route, Slow Pings, timeouts on after server restore

I am getting bad ping times on my server, especially for large data requests. The stored procedure on the server runs at 1 second, while calling it through my web applicaiton takes 23+ seconds. This ...
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61 views

packet loss between two specific VMs

I am experiencing some high-percentage packet loss (more than 70%) between two specific VMs in a local network, in a remote cluster (I have no physical access to it). One machine is used as a hadoop ...
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3answers
145 views

DNS issue? I cannot ping FQDN, yet I can ping alias (CNAME)

I'm experencing weird DNS issue and I was wondering if someone has any ideas: # ping -c1 test.XXX.local ping: unknown host test.XXX.local # ping -c1 test PING test.XXX.local (10.52.223.41) 56(84) ...
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Why would I get different ping times directly to 10.0.1.1 versus pinging google.com with TTL 1? [closed]

Using mtr to gather some statistics, if I run sudo mtr 10.0.1.1 to ping my router, it looks terrible: My traceroute [v0.85] Johns-MacBook-Air.local (0.0.0.0) ...
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108 views

How can be ping used to measure a server speed? [closed]

When I ping myserver.com, I get this responses: 64 bytes from XXX.XXX.XXX.XXX: icmp_seq=1 ttl=242 time=52.6 ms 64 bytes from XXX.XXX.XXX.XXX: icmp_seq=2 ttl=242 time=55.9 ms 64 bytes from ...
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37 views

Android/Linux Ping sends another packet before packet timeout

I have to send 10 packet & timeout for each packet should be 3 secs. As Android pings works on Linux ping commands, I am using below ping command in my application: ping -c 10 -W 3 -s 32 ...
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69 views

VPS server ping ok, but don't respond

First time here. I'm (was) using a virtual server with Kloxo, 2GB RAM, 2vCPUs, Centos 6.x 64bits. After 3 days working fine, it doesn't respond anymore, only ping works. The only change I did lately ...
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1answer
36 views

Dedicating a server for latency test

I've created a server to test bandwidth from employees working remote (using speedtest.net mini), but was wondering if anyone knew of a way to setup some software in linux to test latency and possibly ...
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1answer
137 views

Linux network namespaces - ping fails on specific veth

I just started to exploring network namespaces. I try to implement the following simple setting following the article in http://www.opencloudblog.com/?p=42 +--------+ ...
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OpenWRT and multple WANs: active/open connections doesn't update when alternate WAN

Here is my scenario: I have a OpenWRT Backfire 10.03 installed on a Mikrotik RB411U. I have two WANs: a 3G and a wifi. The eth0 interface is my lan. I configured the iptables to MASQUERED both WANs: ...
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1answer
58 views

Server not responding to http or ping but ssh works

I can access to a VPS through ssh. That VPS has httpd installed on it and running to listen onto port 80. However I can't ping that VPS nor access to his apache but I can log in with ssh. This is ...
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1answer
137 views

Unable to ping 127.0.0.1 … except as local Administrator

I'm having this issue with two Server 2008 R2 domain member servers built as VMWare guests. The DCs built at the same time do not have this issue. When I try to ping 127.0.0.1 (or "localhost") when ...
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24 views

Cannot ping address for nic removed from 2012 Team

We have 4 nics in a 2012 Team. We want to remove 2 of the nics and create a new team with them using a private ip. When I do that it pings to the gateway instead of the local interface. Route print ...
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2 servers with 2 ip adresses cant ping each other

I rent 2 root servers from my provider that run Ubuntu 12.04.01 LTS. I ordered a second ip for each of them and configure them in /etc/network/interfaces as follows: iface eth0:1 inet static ...
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1answer
84 views

Ping to pppoe server fails, while reverse is working

I have created a Linux PPPoE server on CentOS release 5.4 (Final) x86_64 machine (Linux 2.6.18-164.el5 #1 SMP). I have also established the PPPoE connection successfully. However, ping to server from ...
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1answer
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ping -a sometimes returns host name and sometimes returns FQDN. Why? Does this mean DNS is corrupt somehow?

I have a Windows machine called abcd for example and it uses DHCP to receive an IP address (172.28.45.5 for example) When I perform ping -a 172.28.45.5 sometimes I receive abcd as the hostname. ...
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Setup machines network in Windows Azure

I'm building a web application and I've decided to host it on Windows Azure. My application has three components: A front-end created with Play Framework (machine A) A back-end core written in Java ...
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Windows servers on same gigabit lan switch, what might cause Windows 2008 R2 to have 50% longer ping times than Windows 2003 server?

After installing a brand new HP Proliant DL380e Gen8 running SBS 2011 (Windows 2008 R2 X64) I noticed a difference in response to ping requests on the wired ethernet local LAN, even before the ...
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VLAN configuration on Ubuntu

I need some help with vlans because I'm a bit confused. I setup a transparent vlan over a topology like the one bellow: Host_1 (vlan 11) <---> [switch] <--(vlan 11)--> [switch] <---> Host_2 ...
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216 views

pinging an unknown hosts from centos resolves

I am seeing very strange behavior with servers running CentOS 6.4 x64. If I run a ping on a host which clearly doesn't exist: ➜ ~ ping sdafsadfdsadfsasdfasdoi.com PING ...
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2answers
69 views

Setting up 2 IPv6 Subnets and ping across Cisco router [closed]

I am trying to setup 2 IPv6 subnets across a Cisco 2621 Router. I am having some trouble... I have assigned: fe0/0 2607:fcb8:10::x:x:x:x fe0/1 2607:fcb8:11::x:x:x:x On the fe0/0 side I have a ...
2
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1answer
62 views

Maximum MTU size

Thought one of the issues I'm experiencing with the following question is due to MTU rightfully so. ESXi 5 VM Putty session hangs, vSphere client timing out However, when I tried testing the ...
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1answer
169 views

ping incorrectly pinging 127.0.0.1

I've got an odd DNS issue. I'm running a dual ipv4/ipv6 environment on Gentoo Linux. Pinging some sites results in ping pinging 127.0.0.1. e.g. #> ping authserver.mojang.com PING ...
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159 views

I can't ping to my EC2 instance although icmp has been set

I wasn't able to ping to my ec2 server although I've done the following command: ec2-authorize default -P icmp -t -1:-1 -s 0.0.0.0/0 when I try this again it gives me: ...
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Version of Ping that outputs returned Payload?

Is there a version of Ping that has a command line option that outputs the payload returned? If so, can you please point me to it?
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1answer
98 views

AWS EC2 instance not pingable or available in browser

I've seen this questions asked other places, but now I've run through every fix proposed in other questions so I'm re asking it here, in hopes that someone will have a different solution. Problem: I ...
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173 views

Server 2012 intermittently fails to respond to pings from single host, even with firewall disabled, but responds to non-ICMP requests fine

This one is kind of weird. I've got the following machines involved: DC01 - 10.1.2.42, Server 2012, domain controller & DNS server, physical machine nagiosv - 10.1.2.35, CentOS 6.4, Nagios, ...
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41 views

2 Nics - Same Subnet..Route backup traffic through one of them [duplicate]

I have a windows server and a centos linux server. I want the nightly backup file (targz) that copies to the windows machine to use a different nic so that the main nic is not burdenend with moving ...
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87 views

If a server is performing slowly, will ping still appear normal?

I'm trying to troubleshoot an intermittent slow application problem without direct access to the network. There is a server on one network providing webpages to a VLAN on a different network via a ...
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2answers
75 views

root domain to www forwarding issue

I want to forward my root domain(yourdomain.com) to www.yourdomain.com Should I delete the A record of the root domain and then setup 301 permanent forwarding to www.yourdomain.com? I am hosting my ...