CX91x Monitor Link configuration

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Monitor Link is a port association mechanism that monitors the uplink ports connected to a device and triggers the up/down status changes of downlink ports according to the up/down status changes of uplink ports and then triggers the topology protocols on downstream devices to perform link switchovers.
If a downstream device is connected to an upstream device through a single uplink, a single point of failure will result in service interruption. If the dual-uplink mode is used, a downstream device is connected to two upstream devices to reduce the impact of single points of failure, thereby improving network reliability.

For details about the CX91x Monitor Link configuration, see the following documents.
? C00 version:
http://support.huawei.com/enterprise/en/doc/DOC1000018101/?idPath=7919749|9856522|21782478|19955021|19961380
? C10 version:
http://support.huawei.com/enterprise/en/doc/DOC1000041694/?idPath=7919749|9856522|21782478|19955021|19961380

Other related questions:
Default user name and password of the CX91x
The default user name and password of the BMC and onboard Ethernet switching plane of the CX91x are as follows: Default user name: root Default password: Huawei12#$ In some cases (such as serial port login and BIOS login), you only need to enter the password but do not need to enter the user name. The default user name and password of the FC switching plane (available only for CX911 and CX912) are as follows: Default user name: admin Default password: Huawei12#$

BFD and VRRP association on S series switch
For details about BFD for VRRP configuration on an S series switch, except S1700, see Example for Configuring Association Between VRRP and BFD to Implement a Rapid Active/Standby Switchover in the S1720&S2700&S3700&S5700&S6700&S7700&S9700 Typical Configuration of Typical Features.The configurations on all models are the same.

Configuring link groups on the firewall
Mechanism of the HA link group on the firewall 1. In hot standby environment, add the upstream and downstream service interfaces to the same link group. When an interface is faulty and becomes down, it triggers the status of all interfaces in the group to be down. This guarantees fast route convergence on the upstream and downstream routers. 2. The link-group function binds the status of several interfaces to form a logical group. If any of the interfaces in the link-group fails, the system changes the status of all other interfaces to Down. After all interfaces in the group recover, the system changes the interfaces to Up. The link-group function guarantees that the upstream and downstream interfaces are in the same status. This prevents inconsistent upstream and downstream link paths after active/standby switchover. You are advised not to add interfaces on interface cards 18FE+2SFP, 16GE+4SFP, 5FSW, and 8FE+2GE to the link-group. Using them first is recommended. 3. Configure or delete the link group primary interface or interfaces on other interface cards through the web UI. a. Choose System > High Availability > Link Group. b. In Link Group, select the link group to be configured and modify it. c. Perform as follows to add the interface to or remove it from the link group. Add the interface to the link group. In the Available group box, select one or multiple interfaces or double-click an interface. To add all interfaces to the link group, click All. After the configuration succeeds, added interfaces are displayed in the Selected group box. Remove the interface from the link group. In the Selected group box, select one or multiple interfaces or double-click an interface. To remove all interfaces from the link group, click Clear. After the configuration succeeds, removed interfaces are displayed in the Available group box. d. Click Apply. 4. CLI configuration method: Run the system-view command to access the system view. Run the interface interface-type interface-number command to enter the interface view. Run the link-group link-group-id command to add the interface to the link group. Run the undo link-group command to remove the interface from the link group.

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