If someone configured Router or Switch, You didn’t know its IP address but you know it was configured in the subnet 172.16.0.x. So now you can directly connect your laptop to the Router or Switch interface and configure your own IP as 172.16.0.20 (anything in the same subnet would work). Then ping the broadcast address of subnet: ping 172.16.0.255 and find below result for broadcast IP address. 32 bytes from 172.16.0.20: icmp_seq=0 ttl=64 time=0.168 ms 32 bytes from 172.16.0.21: icmp_seq=0 ttl=64 time=0.327 ms The first response is our own IP, so the second must be the switch (Press Control-C). This technique should work on just about any IP device. If you know the subnet, you can find the IP address. Ping Broadcast Domain at Once: If you need to ping several devices in one same subnet and broadcast domain, you can do several commands or ping like the one below. […]
Stop Extended Ping or Traceroute in Cisco Router: If you don’t want to continue extended ping up to repeated number of times or Traceroute up 30 hops, you can find below option to ‘escape sequence’ to stop a Cisco extended ping or traceroute is. One way actually works is holding CTRL + SHIFT then pressing the number 6 key twice. Returning to the Terminal Server from Cisco Router: To exit a Cisco device and return to the terminal server, hold CTRL + SHIFT then press 6. Release CTRL + SHIFT and press X.
The table below lists the possible output characters from the ping facility: Character Description ! Each exclamation point indicates receipt of a reply. . Each period indicates the network server timed out while waiting for a reply. U A destination unreachable error PDU was received. Q Source quench (destination too busy). M Could not fragment. ? Unknown packet type. & Packet lifetime exceeded.