CNA configuration and deployment

These commands will have to be repeated for each USTAT module/ISP pair; at which point the configuration would model the network shown in Figure 95.

Routing Configuration

Here, the routing to the USTAT VIPS are configured; the IBGP peering between the edge router and the CNA system is also configured

VIP Routing:

USTAT modules do not support dynamic routing protocols, so static routes will be used. On each edge router, you static routes are created to each of the CNA tunnels configured on that router.

In global config mode on the edge router Ra, the following Cisco IOS command is used:

ip route 172.25.5.1 255.255.255.255 Tunnel1

On the edge router Rb, the following Cisco IOS command is used:

ip route 172.25.5.2 255.255.255.255 Tunnel2

ip route 172.25.5.3 255.255.255.255 Tunnel3

The addresses are the VIPs assigned to each USTAT. Tunnel1 and Tunnel2 coexist on one edge router; Tunnel3 is alone on the other.

Note:

Note: In order to accommodate asymmetric routing—a situation where a packet destined for USTATa, which is configured for Tunnel1, arrives at router ER2, which is configured for Tunnel2—static routes may need to be redistributed into an interior routing protocol, or additional static routes will have to be placed on each edge router.

IBGP

On the edge router, the router bgp command is used with the enterprise’s Autonomous System Number:

router bgp 65002

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Avaya 555-245-600 manual Routing Configuration, VIP Routing