Dell N3200-ON Networking N-Series Switches User Guide version 6.8.0 - Page 1146

Table 31-1. IP Routing Features (Continued) Feature Default gateway ARP table ICMP Router Discovery Protocol (IRDP) Routing table entries Route preferences Description The switch supports a single default gateway. A manually configured default gateway is more preferable than a default gateway learned from a DHCP server. The switch maintains an ARP table that maps an IP address to a MAC address. Static ARP entries can be created in the table and various ARP table settings can be managed, such as the aging time of dynamically-learned entries. Hosts can use IRDP to identify operational routers on the subnet. Routers periodically advertise their IP addresses. Hosts listen for these advertisements and discover the IP addresses of neighboring routers. The following route types can be configured in the routing table: • Default: The default route is the route the switch will use to send a packet if the routing table does not contain a longer matching prefix for the packet's destination. • Static: A static route is a route that you manually add to the routing table. • Static Reject: Packets that match a reject route are discarded instead of forwarded. The router may send an ICMP Destination Unreachable message. The common routing table collects static, local, and dynamic (routing protocol) routes. When there is more than one route to the same destination prefix, the routing table selects the route with the best (lowest) route preference. 1146 IP Routing