Zhone 5100 참조 매뉴얼
CHAPTER 3
Interfaces
Interfaces
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Vpacket 5100/6100 Series Reference Manual
Loopback interface commands
The 5100/6100 VDR supports the capability to add an IP address to carry voice traffic on a
standard loopback interface. This IP address is local to the 5100/6100 VDR and is reachable from
all other interfaces on the 5100/6100 VDR (i.e. you can ping this IP address from a connection
on any of the other IP-enabled interfaces of the 5100/6100 VDR). Telnet, Web, and SNMP
applications can be accessed on this IP address.
This feature can be used to add a “public IP” address to the VDR without adding it any of the
This feature can be used to add a “public IP” address to the VDR without adding it any of the
externally visible interfaces, such as the LAN or the WAN interfaces. The Loopback interface is
purely a private interface. Although the loopback interface is a private interface, the IP address
assigned to it is publicly visible. This means that a host on the WAN side can ping this IP address
even if NAT is enabled on the 5100/6100 VDR.
For a publicly routed 5100/6100 VDR, the voice IP address is set to match the WAN IP address,
For a publicly routed 5100/6100 VDR, the voice IP address is set to match the WAN IP address,
which means that voice packets are sent over the WAN. See Figure 3-4.
Figure 3-4. Voice services for a publicly routed 5100/6100 VDR
Figure 3-5 shows how you can restrict the voice traffic to a private network. Without the loopback
Figure 3-5 shows how you can restrict the voice traffic to a private network. Without the loopback
interface enabled, the voice traffic must pass through the private network to the service provider’s
backbone router. By enabling the loopback interface to use a public IP address, you can allow
Phone
WAN
Voice interface
6100 VDR
Internet
Public routed
IP address: 205.176.94.11
IP address: 205.176.94.11
Voice
PBX
Private LAN address: 10.10.10.254
Default gateway: 10.10.10.254