testing environment of a financial customer, service cutover on NE40Es is
simulated. An error occurs in the test, and traffic forwarding fails.
1. Check BGP
routes. It is found that BGP routes are missing.
2. Check OSPF routes. It is found that OSPF routes are missing.
3. Check OSPF configurations. It is found that OSPF configurations are
operation logs of routers. It is found that the controller has delivered the
operation of deleting the OSPF configuration through NETCONF.
5. Check the
AC controller operation logs. It is found that the AC controller has performed
automatic reconciliation and the operation of deleting OSPF configuration has
been delivered during reconciliation.
reconciliation on the AC controller. It is found that the OSPF configuration on
the forwarder is different from that saved on the controller. The controller
incorrectly determines that inconsistent OSPF configuration needs to be
restored through reconciliation and therefore delivers the OSPF configuration.
configuration is changed on a router, the controller incorrectly determines
that the configuration is not delivered in an end-to-end manner. The controller
simply performs reconciliation and changes the OSPF configuration on the router
in overriding mode. As a result, the OSPF configuration is missing on the
router, affecting network connectivity.
Workaround: Disable the NETCONF write permissions granted to the AC
controller by routers.
Solution: Upgrade the patch V300R001C10SPC200 of the AC controller.
If the AC controller implements traffic
optimization only, you are advised to disable the NETCONF write permissions
granted to the AC controller by routers.