Abstract: The disclosure relates to a method of LSP number planning in an inter-chassis device comprising a plurality of peers. In one embodiment, the method comprises steps of generating an LSP and transmitting the generated LSP outside at a peer. The LSP number in the generated LSP is a number in a number range assigned to that peer. The number ranges assigned to different peers of the inter-chassis device do not overlap with each other. By the LSP number planning method, the peer may discover automatically other peers in the same inter-chassis, and announce itself independently.

Abstract: A method and apparatus for managing a media access control address are provided. The method comprises assigning a priority to the MAC address. The method also comprises managing the MAC address in a forwarding database based on the priority. With the method and apparatus, a MAC flooding attack can be efficiently avoided and communication performance would be improved in a secure manner.

Abstract: A method and system for maintaining clock synchronization in a communication network having multiple clocks are disclosed. According to one aspect, the invention provides a first precision time protocol (PTP) instance and second PTP service instance. Dynamic PTP parameters and tuning PTP parameters are periodically cloned from the first PTP service instance to the second PTP service instance substantially in real time.

Abstract: The disclosure relates to a method of Link State ID planning in an inter-chassis device comprising a plurality of peers. In one embodiment, the method comprises steps of generating an LSA and transmitting the generated LSP outside at a peer. The Link State ID in the generated LSA is selected from a number range assigned to that peer. The number ranges assigned to different peers of the inter-chassis device do not overlap with each other. By the Link State ID planning method, the peer may discover automatically other peers in the same inter-chassis device.

Abstract: A gateway, a method performed by the gateway for connecting to an access point of a communication network, a DHCP server and a method performed by the DHCP server for providing IP addresses to a moveable gateway are provided. The gateway is connected to a communication network via a first access point and the gateway is further connectable to a plurality of hosts, which hosts may be connected to the communication network by means of the gateway. The method comprises changing access point from the first access point to a second access point; and requesting an IP address of an uplink IP interface of the gateway from a DHCP server. The method further comprises receiving the IP address of the uplink IP interface of the gateway from the DHCP server; and notifying security applications within the gateway of the gateway information with regards to the received IP address.

Abstract: The disclosure relates to a method of LSP number planning in an inter-chassis device comprising a plurality of peers. In one embodiment, the method comprises steps of generating an LSP and transmitting the generated LSP outside at a peer. The LSP number in the generated LSP is a number in a number range assigned to that peer. The number ranges assigned to different peers of the inter-chassis device do not overlap with each other. By the LSP number planning method, the peer may discover automatically other peers in the same inter-chassis, and announce itself independently.

Abstract: A method and apparatus for managing a media access control address are provided. The method comprises assigning a priority to the MAC address. The method also comprises managing the MAC address in a forwarding database based on the priority. With the method and apparatus, a MAC flooding attack can be efficiently avoided and communication performance would be improved in a secure manner.

Abstract: A method and system for maintaining clock synchronization in a communication network having multiple clocks are disclosed. According to one aspect, the invention provides a first precision time protocol (PTP) instance and second PTP service instance. Dynamic PTP parameters and tuning PTP parameters are periodically cloned from the first PTP service instance to the second PTP service instance substantially in real time.

Abstract: An intelligent supervisor located at a management node in the PTP network determines the PTP roles and configuration of the client nodes. The intelligent supervisor communicates with intelligent supervisor agents located at client nodes in the PTP network. The intelligent supervisor agents at the client nodes feed back information, such as the PTP properties of the client nodes, to the intelligent supervisor. The intelligent supervisor analyzes the data to determine the roles and appropriate configuration for the client nodes.