Ethernetsubinterface indirect link failure direct connected subnet
Hello. Given the following topology:
R1#SW1----- | SW3--Host # SW4--Host | R2#SW2-----
R1 and R2 are connected via an Ethernet dot1q Trunk to SW1/SW2. On SW1/SW2 there're static access ports which connects to SW3/SW4. SW3 is connected to SW4 via Trunk.
SW1/SW2 and SW3/SW4 are under different administration.
The following problem: R1 and R2 are member of the same IPv4 /25 Network. That means the subinterface on R1 uses 22.214.171.124/25 and R2 uses 126.96.36.199/25. The Hosts are also Members of this network.
The following Problem: If the Link SW1 to SW3 fails, the Subinterface on R1 will remain up and R1 will send traffic to the network 188.8.131.52/25 to SW1 where the traffic will be dropped. The same situation if the link SW2-SW4 fails.
Are there any possibilites to automatically shutdown the subinterface on R1 or R2, so that the directly connected route will be removed?
R1/R2 use IOS XR
On R1 & R2 there`s HSRP configured to provide a redundant gateway to the hosts
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