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RRI does not inject 32-bit mask routes for the Cisco EzVPN client router in the Network Extension mode

Core issue

When Cisco EzVPN is used in the Network Extension mode to connect to a VPN concentrator with Reverse Route Injection (RRI) enabled, no route is injected for interfaces configured with a 32-bit netmask.

An example for such an interface is a loopback with a /32 IP address, used for remote management through the VPN tunnel.

This problem occurs only when EzVPN is used on the router, and does not affect regular LAN-to-LAN configuration on both sides.

Resolution

This issue is due to the presence of Cisco bug ID CSCsc66851.

As a workaround, use a netmask that is lower than 32 bits.

Problem Type

Troubleshoot software feature

Product Family

Routers

VPN - hardware & software clients

VPN 3000 Software Version

4.7

VPN 3000 Model

3060

3080

3015

3030

VPN Tunnel End Points

Router

VPN 3000 series

Features & Tasks

Reverse route injection

Easy VPN

Network extension mode

VPN Protocols

IPSec

Bug ID

Bug ID not listed

455
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