Changing subnet mask on networks and configure routing on ISR running CIOS 12.4
Posted on 2007-08-09
In a test lab I have the following:
SITE A: Cisco ISR 2811
VPN Pool: 192.168.4.0/24
SITE B: Cisco PIX 506e
VPN Pool: 192.168.6.0/24
SITE C: CIsco PIX 501
VPN Pool: 192.168.5.0/24
The ISR is brand new and is not yet configured for routing and is acting as a hub and the PIXes as spokes. There are IPSec tunnells between the PIXes and the ISR. Users that access any of the three devices using Cisco VPN Client software lease an IP address fron the VPN Pool associated with the device their are connecting to.
What I would like to do is configure routing on the ISR in as simple a fashion as possible.
Would changing the subnet mask from /24 to say /21, using classless routing, help to simplify the routing configuration on the ISR? Would I need to enable OSPF or RIPv2? If so, how would the routes be configured?
ip route 192.168.1.0/21 192.168.1.250/21?
Yes, I am hapless at routing because I am a newb.