Appendix B Site-to-Site VPN User Interface Reference
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| Site to Site VPN Policies |
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Table | GRE Modes Page > GRE or GRE Dynamic IP Policy (continued) | ||
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Element |
| Description | |
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AS Number |
| Available only if you selected the EIGRP routing protocol. | |
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| The number that will be used to identify the autonomous system | |
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| (AS) area to which the EIGRP packet belongs. The range is | |
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| An autonomous system (AS) is a collection of networks that share | |
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| a common routing strategy. An AS can be divided into a number of | |
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| areas, which are groups of contiguous networks and attached hosts. | |
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| Routers with multiple interfaces can participate in multiple areas. | |
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| An AS ID identifies the area to which the packet belongs. All | |
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| EIGRP packets are associated with a single area, so all devices must | |
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| have the same AS number. | |
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Process Number |
| Available only if you selected the OSPF routing protocol. | |
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| The routing process ID number that will be used to identify the | |
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| secured IGP that Security Manager adds when configuring GRE. | |
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| The range is | |
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| Security Manager adds an additional Interior Gateway Protocol | |
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| (IGP) that is dedicated for IPSec and GRE secured communication. | |
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| An IGP refers to a group of devices that receive routing updates | |
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| from one another by means of a routing protocol. Each “routing | |
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| group” is identified by the process number. | |
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| For more information, see How Does Security Manager Implement | |
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| GRE?, page | |
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Hello Interval |
| Available only if you selected the EIGRP routing protocol. | |
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| The interval between hello packets sent on the interface, from 1 to | |
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| 65535 seconds. The default is 5 seconds. | |
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Hold Time |
| Available only if you selected the EIGRP routing protocol. | |
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| The number of seconds the router will wait to receive a hello | |
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| message before invalidating the connection. The range is | |
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| The default hold time is 15 seconds (three times the hello interval). | |
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| User Guide for Cisco Security Manager 3.0.1 |
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