Drni Failure Handling Mechanisms - H3C S7500X Series Configuration Manual

Table 3 Global type 2 configuration
Setting
VLAN interfaces
Passing tagged VLANs
or passing PVID
Table 4 DR interface type 2 configuration
Setting
Passing tagged VLANs
Passing untagged
VLANs

DRNI failure handling mechanisms

DR interface failure handling mechanism
When the DR interface of one DR member device fails, the DR system forwards traffic through the
other DR member device.
As shown in
through a multichassis aggregation. If traffic to Device C arrives at Device B after the DR interface
connected Device B to Device C has failed, the DR system forwards the traffic as follows:
1. Device B sends the traffic to Device A over the IPL.
2. Device A forwards the downlink traffic received from the IPL to Device C.
After the faulty DR interface comes up, Device B forwards traffic to Device C through the DR
interface.
Figure 3 DR interface failure handling mechanism
IPL failure handling mechanism
As shown in
To avoid network issues, the secondary DR device sets all network interfaces to DRNI MAD DOWN
state, except for the following interfaces:
•
Interfaces excluded from the MAD shutdown action by IRF.
•
Interfaces excluded from the MAD shutdown action by DRNI.
Details
Up VLAN interfaces of which the VLANs contain the IPP.
VLANs of which the IPP forwards tagged traffic or PVID of which the IPP forwards
traffic.
Details
VLANs of which a DR interface forwards tagged traffic.
VLANs of which a DR interface forwards untagged traffic.
Figure 3, Device A and Device B form a DR system, to which Device C is attached
Figure 4, multi-active collision occurs if the IPL goes down while the keepalive link is up.
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