![]() ![]() ![]() Unfortunately this presents a problem as there is vpls between the loopback of all of the devices, and there is corresponding loss over the vpls tunnel.ĭoes anyone have any suggestions on steps to troubleshoot this or have an idea of what it could be? My best guess is it's related to ospf or mpls. it shows random packet loss with no obvious pattern to the loopback of the 2004, but not to either of the physical interfaces on the device(one connected to fiber, one connected to wireless). I have smokeping running on a third server in the same location as the 2 CHRs, with a ping probe doing 5 pings 20sec. They all have a bridge (no ports on it) acting as the loopback for ospf. Id like to be able to setup two different IP addresses (AddressA and AddressB) on one Ethernet. Youll find more info on this StackOverflow thread: Sniffer for localhost (Windows OS) Share. For a project at work, I need to be able to test various Ethernet NICs by connecting them to a 'loopback adapter plug', like this one on various embedded Linux boxen that come off a production assembly line. RawCap will create a pcap file that you can load into Wireshark, NetworkMiner or whatever youd like. To use ping to verify that TCP/IP is working correctly, run the command: ping 127.0.0.1. ![]() 2- if the local host know the mac address of the dst but the dst is down. 'Reply from 20.1.1.1: Destination host unreachable.' and that means the local device 20.1.1.1 has arp failure. Wireless interface cost is 20, fiber is 10 on all 3 devices. You can use RawCap (a raw socket sniffer) to sniff localhost traffic in Windows. You should be able to ping the Loopback address from the Router, the Switch, and the PC since they all rely upon the Router to know about the address (the PC and Switch have the Router set as the Default Gateway for each of their respective subnets, and the Router 'owns' the Loopback0 address). This article provides steps to troubleshoot network connection issues by pinging the loopback address (127.0.0.1). 1-if the local host dont know the mac address of the dst and try to arp to the dst mac without any results, the results will be. These problems can all be caused by various similar issues, which hopefully you will be able to find and fix using this easy way to test for them. To find the IP for your local machine use: For windows and the address listed next to IPv4 Address ipconfig. This site uses cutting-edge WebRTC technology to check your Internet connections packet loss, latency, and latency jitter in your browser for free. Mpls, vpls, ospf between the 3(full mesh) across 2 different connections, 1 is a wireless connection, the other a fiber connection. If a time-out occurs here and not for Ping Loopback and Ping Local Machine then the issue lays with your Gateway/Router and you should contact the manufacture of the device. The way the packet destined for loopback adapters is processed is another question but that does not affect the packet format or protocols/layers used. Okay, I have 2 CHRs(running vrrp), and a ccr2004. No matter what you ping (loopback or some distant address) packet must have all required layers (in this case from 1 through 3). ![]()
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