What does the word serno mean on the end of an EIGRP topology entry when you issue the show ip eigrp topology command?
A. For example: show ip eigrp topology P 172.22.71.208/29, 2 successors, FD is 46163456 via 172.30.1.42 (46163456/45651456), Serial0.2, serno 7539273 via 172.30.2.49 (46163456/45651456), Serial2.6, serno 7539266 Serno stands for serial number. When DRDBs are threaded to be sent, they are assigned a serial number from a circular number space shared by all interfaces. If you display the topology table at the time an entry is threaded, it shows you the serial number associated with the DRDB. Threading is the technique used inside the router to queue items up for transmission to neighbors. The updates are not created until it is time for them to go out the interface. Prior to that, a linked list of pointers to items to send is created (for example, the thread). These sernos are local to the router and are not passed with the routing update.
A. For example: show ip eigrp topology P 172.22.71.208/29, 2 successors, FD is 46163456 via 172.30.1.42 (46163456/45651456), Serial0.2, serno 7539273 via 172.30.2.49 (46163456/45651456), Serial2.6, serno 7539266 Serno stands for serial number. When DRDBs are threaded to be sent, they are assigned a serial number. If you display the topology table at the time an entry is threaded, it shows you the serial number associated with the DRDB. Threading is the technique used inside the router to queue items up for transmission to neighbors. The updates are not created until it is time for them to go out the interface. Before that, a linked list of pointers to items to send is created (for example, the thread). These sernos are local to the router and are not passed with the routing update.
