3/10/2024 0 Comments Ping loopback why![]() ![]() Use the help switch with the ping command to show detailed help about the command's several options. This is the destination you wish to ping, either an IP address or a hostname. This forces the ping command to use IPv6 only but as with the -4 option, is only necessary when pinging a hostname. This forces the ping command to use IPv4 only but is only necessary if target is a hostname and not an IP address. Use this switch to ping a Hyper-V Network Virtualization provider address. C:UsersMe>ping 151.101.194.114 Pinging 151.101.194.114 with 64 bytes of data: Reply from 151.101.194.114: Destination host unreachable So, whats going on here In simple terms, were trying to communicate with a device at the specified IP address, but the remote gateway is unable to direct our ping request to the host itself, and so it sends. Use this option to specify the source address. So when you ping the EAST loopback you are sourcing it with the 172.16.124.3 ip address. ![]() ![]() 3) add a route on your core switches for the loopback pointing to the vlan 10 SVI ip address. 2) give the SVI for vlan a ip address and make it reachable from your core switches. 1) on the access switch configure a management vlan eg. This option tells the ping command to trace the round trip path. So here is what I think is going on: When you issue a ping command like you did from the router, the router uses the ip address of the outbound interface to source the ip packet. If it is acting as a L2 switch then you would have to do the following. If you don't use the -w option, the default timeout value of 4000 is used, which is 4 seconds. It looks like the name resolution is not working from user but from root only. Specifying a timeout value when executing the ping command adjusts the amount of time, in milliseconds, that ping waits for each reply. 127.0.0.1 localhost The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters if I ping 127.0.0.1 IPv4 is used, OK if I ping ::1 IPv6 is used, OK. The maximum value for count is 4, meaning that only the first four hops can be time stamped. Use this option to report the time, in Internet Timestamp format, that each echo request is received and echo reply is sent. ![]() The maximum value for count is 9, so use the tracert command instead if you're interested in viewing all the hops between two devices. Use this ping command option to specify the number of hops between your computer and the target computer or device that you'd like to be recorded and displayed. Beginning in Windows 7, this option no longer functions but still exists for compatibility reasons. This option allows you to set a Type of Service (TOS) value. This option sets the Time to Live (TTL) value, the maximum of which is 255. The -f option is most often used to troubleshoot Path Maximum Transmission Unit (PMTU) issues. Use this ping command option to prevent ICMP Echo Requests from being fragmented by routers between you and the target. The ping command will send a 32-byte echo request if you don't use the -l option. Use this option to set the size, in bytes, of the echo request packet from 32 to 65,527. The ping command will send 4 by default if -n isn't used. This option sets the number of ICMP Echo Requests to send, from 1 to 4294967295. This ping command option will resolve, if possible, the hostname of an IP address target. In addition, check the subnet mask to ensure that a remote address has not been interpreted as a local address.Using this option will ping the target until you force it to stop by using Ctrl+C. If the remote routing tables are correct and contain a valid route back to the sending host, use the arp -a command to determine whether the correct address is listed in the ARP cache. Most often, it indicates that a route back to the sending host has failed, because the destination host, one of the intermediary routers, or the default gateway of the destination host does not recognize the route back to the sending host.Ĭheck the routing table of the destination host to determine whether it has a route to the sending host before checking the routing tables of the individual routers. This message may be the result of network congestion, failure of the ARP request, packet filtering, a routing error, or a silent discard. Indicates that no “Echo Reply” messages were received within the default time of one second. Sorry I don’t have time to research further, but Help in 2000 + Microsoft Knowledge Base should be able to provide the rest of what you need to do. I think you may have a packet filtering problem. ![]()
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