Dell PowerSwitch S4112F-ON OS10 Enterprise Edition User Guide Release 10.4.1.0 - Page 360
Address Resolution Protocol, IPv4 routing commands
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S - static B - BGP, IN - internal BGP, EX - external BGP O - OSPF,IA - OSPF inter area, N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2, E1 - OSPF external type 1, E2 - OSPF external type 2, > - non-active route Gateway of last resort is not set Destination Gateway Dist/Metric Last Change S 200.200.200.0/24 via 10.1.1.2 ethernet1/1/1 0/0 00:00:03 OS10 installs a static route if the next hop is on a directly connected subnet. A next-hop that is not on the directly connected subnet which recursively resolves to a next-hop on the interface's configured subnet is also automatically configured. For example, if interface ethernet 1/1/5 has IP address on subnet 100.0.0.0/8, and if 10.1.1.0/24 recursively resolves to 100.1.1.1, the system installs the static route: • When the interface goes down, OS10 withdraws the route. • When the interface comes up, OS10 reinstalls the route. • When the recursive resolution is broken, OS10 withdraws the route. • When the recursive resolution is satisfied, OS10 reinstalls the route. Address Resolution Protocol Address Resolution Protocol (ARP) runs over Ethernet and enables end stations to learn the MAC addresses of neighbors on an IP network. Using ARP, OS10 automatically updates the ARP cache table which maps the MAC addresses to their corresponding IP addresses. The ARP cache enables dynamically learned addresses to be removed after a configured period. Configure static ARP entries You can manually configure static entries in the ARP mapping table. Dynamic ARP is vulnerable to spoofing. To avoid spoofing, configure static entries. Static entries take precedence over dynamic ARP entries. 1 Configure an IP address and MAC address mapping for an interface in INTERFACE mode. ip arp ip-address mac address • ip-address-IP address in dotted decimal format-A.B.C.D. • mac address-MAC address in nnnn.nnnn.nnnn format These entries do not age, and you can only remove them manually. To remove a static ARP entry, use the no arp ip-address command. Configure static ARP entries OS10(config)# interface ethernet 1/1/6 OS10(conf-if-eth1/1/6)# ip arp 10.1.1.5 08:00:20:b7:bd:32 View ARP entries OS10# show ip arp interface ethernet 1/1/6 ! interface ethernet1/1/6 ip arp 10.1.1.5 08:00:20:b7:bd:32 no shutdown ! IPv4 routing commands 360 Layer 3
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