Auto route injection - link failure
Auto route injection - link failure
ISP1
ISP2
R1
R2
R3
R4
24.10/16
140.15/16
24.10.6/24
140.15.7/24
24.10.6.14
140.15.7.4
route to
24.10.6/24
route to 140.15.7/24
(auto-injection)
1. R2 detects that:
(a) R4 is up, but
(b) connectivity through R4
is down
2. R2 injects additional route
(that used to be injected by R4)
route to 24.10/16
route to 140.15.7/24
(auto-injection)
route to 140.15/16