D-Link DGS-6600-48T Configuration Guide - Page 265

Volume 4-Layer 3 Configurations / Chapter 27-Routing Information Protocol Next Generation (RIPng) Chapter Overview RIP can be considered as an effective solution for small homogeneous networks. For larger, more complicated networks, RIP's transmission of the entire routing table every 30 seconds may put a heavy amount of extra traffic in the network. The workflow is shown below. Figure 27-2 Timers Update timer By default, every 30 seconds the RIPng process wakes up on each interface to send an unsolicited response message to the neighboring routers. This response contains the entire routing table known to the RIP process, except for routes that follow the split horizon rule. One or more response messages may be needed. This timer is kept for each router interface. Timeout timer Each time a route entry is updated, the timeout time for this route entry is reset to zero. If the route entry reaches 180 seconds without another update, it is considered to have expired. The metric is set to 16, and the garbage collection process begins. In addition, the Route Change flag is raised to indicate a change. The output process uses this flag to trigger an update. This timer is kept for each routing table entry. Garbage-collection timer This timer is set for 120 seconds for each route entry that has timed out or has been received with a metric of 16. Only upon expiration of this timer will the route entry finally be removed from the routing table. If a new update to this route arrives before the garbage collection timer expires, the route is replaced and the garbage collection timer is cleared. This timer is kept for each routing table entry. DGS-6600 Configuration Guide 265