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mechanism is to share and reuse same address space among different network segments.
This mechanism mitigates the problem of the shortage of IPv4 address temporally; meanwhile
it adds the burden of address translation process for network device and application. Since the
address space of IPv6 has increased greatly, address translation becomes unnecessary, thus
the problems and system cost caused by NAT deployment are solved naturally.
Support extensively deployed Routing Protocol. IPv6 has kept and extended the supports for
existing Internal Gateway Protocols (IGP for short), and Exterior Gateway Protocols (EGP for
short). For example, IPv6 Routing Protocol such as RIPng, OSPFv3, IS-ISv6 and MBGP4+,
etc.
Multicast addresses increased and the support for multicast has enhanced. By dealing with
IPv4 broadcast functions such as Router Discovery and Router Query, IPv6 multicast has
completely replaced IPv4 broadcast in the sense of function. Multicast not only saves network
bandwidth, but enhances network efficiency as well.
26.2.2 IP Configuration
Layer 3 interface can be configured as IPv4 interface, IPv6 interface.
26.2.2.1 IPv4 Address Configuration
IPv4 address configuration task list:
1. Configure the IPv4 address of three-layer interface
2. Configure the default gateway
1． Configure the IPv4 address of three-layer interface
Command
VLAN Interface Configuration Mode
ip address <ip-address> <mask> [secondary]
no ip address [<ip-address> <mask>]
Explanation
Configure IP address of VLAN
interface; the no ip address
[<ip-address> <mask>] command
cancels IP address of VLAN
interface.
26-11
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Troubleshooting
