When the S5700 connects to an H3C switch through an LAG, the two devices fail to ping each other.
1. Check member interfaces. The member interfaces are Up, and physical lines work properly.
2. Run the display eth-trunk command to check the link aggregation interface configuration. All member interfaces of the S5700 are in Unselected state, and member interfaces of the H3C switch work properly. That is, link aggregation negotiation fails.
3. Check the configuration at both ends.
H3C switch configuration:
link-aggregation group 1 mode static
interface Ethernet 1/0/1
port link-aggregation group 1
According to the preceding configuration, both the S5700 and H3C switch use the static LACP mode; however, the two devices cannot interwork in static LACP mode.
4. Modification methods
− Method 1:
Run the undo mode command to change the link aggregation mode of the S5700 to manual. The member interfaces of the S5700 can work properly after the change.
− Method 2:
Change the link aggregation mode of the H3C switch to link-aggregation mode dynamic. The member interfaces of the S5700 can work properly after the change.
The manual link aggregation mode of the S5700 corresponds to the static LACP mode of the H3C switch.
The static LACP mode of the S5700 corresponds to the dynamic LACP mode of the H3C switch.