H3C Technologies H3C S10500 Series Switches - Manual (Page 33)

To do… Use the command… Remarks
Configure a service port not to
shut down when the IRF fabric
transits to recovery state
mad exclude interface interface-type
interface-number
Required
When an IRF fabric transits to
recovery state, all its service
ports are shut down by default.
Manually recovering an IRF fabric
An IRF link failure causes an IRF fabric to divide into two IRF fabrics and multi-active collision occurs.
When the system detects the collision, it holds a role election between the two collided IRF fabrics. The
IRF fabric whose master’s member ID is smaller prevails and operates normally. The state of the other IRF
fabric transitions to recovery state and temporarily cannot forward data packets, as shown in Figure 11 .
In this case, recover the IRF fabric by following these steps:
1. Repair the IRF link. Then, IRF fabric 1 prompts you that an IRF fabric merge will happen and you
need to reboot the switch.
2. Log in to the IRF fabric in recovery state and reboot it (execute the reboot command in user view).
After the switch reboots, the IRF fabric is recovered.
Figure 11 Recover IRF member switches (approach I)
IP network
IP network
IRF 1
(Active)
IRF 2
(Recovery)
IP network
IP network
IRF 1
(Active)
IRF 2
(Recovery)
IRF
IP network
After the IRF link
is recovered IRF merge
IP network
As shown in Figure 12 , if the IRF fabric in active state fails due to exceptions (a member switch fails or link
failure occurs, for example) before the IRF link is recovered, enable IRF fabric 2 (in recovery state) to
change the state of IRF fabric 2 from recovery to active, and repair the IRF links. Then, the two IRF fabrics
merge when the IRF link failure is recovered. The following are the operation steps:
3. Execute the mad restore command on IRF fabric 2 (in recovery state) to change its state from
recovery to active.
4. Repair IRF fabric 1 and IRF links, and then reboot IRF fabric 1.
After the reboot, IRF fabric 1 and IRF fabric 2 merge and the IRF fabric recovers.
27