Frame Relay utilise les messages LMI pour maintenir les connections actives, mais certains réseaux ne supportent pas les paquets LMI
FREEK (Frame Relay End to End Keepalive) permet de maintenir une session entre 2 routeurs
Plusieurs paramètres peuvent être ajusté :
- frame-relay end-to-end keepalive mode
- bidirectional Set bidirectional mode
- passive-reply Set passive-reply mode
- reply Set unidirectional reply mode
- request Set unidirectional request mode
- frame-relay end-to-end keepalive error-threshold
- frame-relay end-to-end keepalive succes-events
- frame-relay end-to-end keepalive timer
- frame-relay end-to-end keepalive event-windows
Configuration
R1 interface Serial0/0 no ip address encapsulation frame-relay ! interface Serial0/0.12 point-to-point ip address 10.1.12.1 255.255.255.0 frame-relay interface-dlci 102 class TEST-KEEPALIVE ! interface Serial0/0.13 point-to-point ip address 10.1.13.1 255.255.255.0 frame-relay interface-dlci 103 ! interface Serial0/0.14 point-to-point ip address 10.1.14.1 255.255.255.0 frame-relay interface-dlci 104 ! ! map-class frame-relay TEST-KEEPALIVE frame-relay end-to-end keepalive mode bidirectional frame-relay end-to-end keepalive timer recv 10 frame-relay end-to-end keepalive event-window send 5 frame-relay end-to-end keepalive event-window recv 5 frame-relay end-to-end keepalive error-threshold send 3 frame-relay end-to-end keepalive error-threshold recv 3 frame-relay end-to-end keepalive success-events send 4 frame-relay end-to-end keepalive success-events recv 4 !
R2 interface Serial0/0 no ip address encapsulation frame-relay ! interface Serial0/0.21 point-to-point ip address 10.1.12.2 255.255.255.0 frame-relay interface-dlci 201 class TEST ! ! map-class frame-relay TEST frame-relay end-to-end keepalive mode bidirectional frame-relay end-to-end keepalive timer recv 10 frame-relay end-to-end keepalive event-window send 5 frame-relay end-to-end keepalive event-window recv 5 frame-relay end-to-end keepalive error-threshold send 3 frame-relay end-to-end keepalive error-threshold recv 3 frame-relay end-to-end keepalive success-events send 4 frame-relay end-to-end keepalive success-events recv 4 !