36 Contents
34 Configuring L2 and L3 Relay
Features . . . . . . . . . . . . . . . . . . . . . . . . 919
L2 and L3 Relay Overview . . . . . . . . . . . . . . . 919
What Is L3 DHCP Relay?
. . . . . . . . . . . . . 919
What Is L2 DHCP Relay? . . . . . . . . . . . . . 920
What Is the IP Helper Feature? . . . . . . . . . . 921
Default L2/L3 Relay Values. . . . . . . . . . . . . . . 925
Configuring L2 and L3 Relay Features (Web) . . . . . 926
DHCP Relay Global Configuration
. . . . . . . . . 926
DHCP Relay Interface Configuration . . . . . . . 927
DHCP Relay Interface Statistics . . . . . . . . . 929
DHCP Relay VLAN Configuration
. . . . . . . . . 930
DHCP Relay Agent Configuration . . . . . . . . . 931
IP Helper Global Configuration . . . . . . . . . . 932
IP Helper Interface Configuration . . . . . . . . 934
IP Helper Statistics . . . . . . . . . . . . . . . . 936
Configuring L2 and L3 Relay Features (CLI)
. . . . . . 937
Configuring L2 DHCP Relay
. . . . . . . . . . . . 937
Configuring L3 Relay (IP Helper) Settings
. . . . 939
Relay Agent Configuration Example
. . . . . . . . . . 941
35 Configuring OSPF and OSPFv3. . . . . . . . 943
OSPF Overview. . . . . . . . . . . . . . . . . . . . . 944
What Are OSPF Areas and Other OSPF
Topology Features?
. . . . . . . . . . . . . . . . 944
What Are OSPF Routers and LSAs?
. . . . . . . 945
How Are Routes Selected?
. . . . . . . . . . . . 945
How Are OSPF and OSPFv3 Different?
. . . . . . 945
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