____________________________________________________________________________________
____________________________________________________________________________________
NTU Optical Network Terminals 23
Destination—destination IP address;
Gateway—gateway IP address;
Subnet Mask—subnet mask (Genmask);
Flag—routing flag:
– U—active route;
– ! —inactive route, packets will be rejected;
– G—the route uses gateway;
– H—destination address is a separate host;
– R—restored route;
– D—the route was created after receiving a redirected ICMP message;
– M—the route was changed by a redirected ICMP message;
Metrics—route priority;
Service—a service the route is associated with;
Interface—an interface the route is associated with.
4.1.6 The “ARP” submenu. Display of the ARP Protocol Cache
The ARP efficiency depends a lot on ARP cache presented in every host. The cache contains Internet
addresses and corresponding MAC addresses. Every record is stored in cache for 5 minutes since its creation.
IP address—client IP address;
Flags—status flags:
– Completed—client is active;
– Incomplete—client does not respond to ARP queries;
MAC address—client MAC address;
Device—client interface.
4.1.7 The “DHCP” submenu. Active DHCP leases
The DHCP table provides a list of active DHCP leases and their duration.
Interface Name—interface that the address was obtained from;
Interface Type—type of the interface;
Hostname—network device name;
MAC address—device MAC address;
IP address—device address in local network that was chosen by router from the pool of IP addresses;
Expires In—remaining time of the address lease.