R2511-HP MSR Router Series Voice Configuration Guide(V5)

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Configuring source IP address binding for SIP messages
Perform this task to specify a source IP address for SIP signaling or media messages by using one of the
following methods.
• Static IP address binding—Uses a static address as the source IP address.
• Interface binding—Uses the IP address of a source interface as the source IP address. In a
large-scale network, an interface obtains its IP address from a DHCP or PPPoE server. In this
scenario, you can use this method to configure an interface as the source of SIP signaling and
media flows to avoid manual configuration.
Source IP address binding is supported on Layer 3 Ethernet interfaces, Gigabit Ethernet interfaces, and
dialer interfaces.
For more information about DHCP, see Layer 3—IP Services Configuration Guide.
For more information about PPPoE, see Layer 2—WAN Configuration Guide.
Configuration prerequisites
If a SIP server is used to forward calls, you need to complete the configurations on the SIP server.
Configuration procedure
To configure SIP support for source IP address binding:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter voice view.
voice-setup N/A
3. Enter SIP client view.
sip N/A
4. Specify a source IP address
for sent SIP signaling or media
flows.
source-bind { media | signal }
{ interface-type interface-number |
ipv4 ip-address }
By default, no source IP address is
bound for SIP signaling and media
flows.
The following table describes how source address binding works in different conditions:
Condition Result
Configure a source address binding when
ongoing calls exist.
• A new source address binding for media does not take effect
for ongoing SIP media sessions but takes effect for
subsequent SIP media sessions.
• A new source address binding for signal takes effect
immediately for all SIP signaling sessions.
The bound source interface or the interface
whose IP address is set as the source
address is shut down.
The source IP address binding becomes invalid and will not work
until the interface is up. During the shutdown period, the
gateway automatically gets a source IP address for sent
signaling or media flows.
The bound static IP address is removed or
modified, or the bound interface is
removed.
The source IP address binding is removed.
The bound interface is disconnected.
The source IP address binding is cancelled, and restored when
the interface is connected.