EIGRP will use the same administrative distance and metric calculation to the GRE TUNNEL. The calculation of cost is based on delay and bandwidth. The bandwidth and delay of the GRE tunnel MUST be taken from the tunnel interface configured on the router. The tunnel will be treated like a directly connected network.

If there are 2 paths to reach a n/w EITHER through a tunnel interface or VLAN interface, EIGRP PREFERS the Virtual-Access Interface VLAN interface because the VLAN interface has greater bandwidth than the tunnel interface. To INFLUENCE the routing through the tunnel interface, It increases the bandwidth parameter of the tunnel interface, or increases the delay parameter of the VLAN interface.

EIGRP will use the same administrative distance and metric calculation to the GRE tunnel. The calculation of cost is based on delay and bandwidth. The bandwidth and delay of the GRE tunnel must be taken from the tunnel interface configured on the router. The tunnel will be treated like a directly connected network.

If there are 2 paths to reach a n/w either through a tunnel interface or VLAN interface, EIGRP prefers the Virtual-Access Interface VLAN interface because the VLAN interface has greater bandwidth than the tunnel interface. To influence the routing through the tunnel interface, It increases the bandwidth parameter of the tunnel interface, or increases the delay parameter of the VLAN interface.