User's Manual  798  Document #: LTRT-10632 
 
  Mediant 800B Gateway & E-SBC 
40.4  Pre-Configured IP-to-IP Routing Rules 
For the CRP application, the IP-to-IP Routing table is pre-configured with IP-to-IP routing rules. 
These rules depend on the configured Call Survivability mode, as described in 'Configuring Call 
Survivability Mode' on page 796. 
 
 
Note:   
•  The IP-to-IP Routing table is read-only. 
•  For accessing the IP-to-IP Routing table and for a description of its parameters, see 
'Configuring SBC IP-to-IP Routing Rules' on page 709. 
 
 
40.4.1  Normal Mode 
The pre-configured IP-to-IP routing rules for the Normal CRP call survivability mode are shown in 
the table below: 
Table  40-2: Pre-Configured IP-to-IP Routing Rules for CRP Normal Mode 
Index  Source IP 
Group / 
Emergency 
Request 
Type 
Destination 
Type 
Destination 
IP Group 
Destination 
Address 
Alternative Route 
Options 
1  Any  OPTIONS  Dest Address  -  Internal  Route Row 
3  #1 [CRP 
Users] 
All  IP Group  #2 [CRP 
Proxy] 
-  Route Row 
4  #1 [CRP 
Users] 
All  IP Group  #1 [CRP 
Users] 
-  Alternative Route 
Ignore Inputs 
5  #1 [CRP 
Users] 
All  IP Group  #3 [CRP 
Gateway] 
-  Alternative Route 
Ignore Inputs 
6  #2 [CRP 
Proxy] 
All  IP Group  #1 [CRP 
Users] 
-  Route Row 
7  #2 [CRP 
Proxy] 
All  IP Group  #3 [CRP 
Gateway] 
-  Route Row 
8  #3 [CRP 
Gateway] 
All  IP Group  #2 [CRP 
Proxy] 
-  Route Row 
9  #3 [CRP 
Gateway] 
All  IP Group  #1 [CRP 
Users] 
-  Alternative Route 
Ignore Inputs 
 
 
Note:  Ind
ex 7 appears only if the CRPGatewayFallback parameter is enabled (see 
'Configuring PSTN Fallback' on page 800). This routing rule is used if the device can't find 
a matching destination user for IP Group 1 (User-type IP Group) in its registration 
database. If the CRPGatewayFallback parameter is disabled and no matching user is find, 
the device rejects the call.