IGP-ISIS Configuration

The intermediate system to intermediate system (IS-IS) routing protocol, a link state protocol, belongs to the internal gateway protocol and is applicable to the internal of the autonomous system. The equipment uses the IS-IS routing protocol, which is used with the label distribution protocols RSVP-TE and LDP to realize the dynamic creation of the MPLS LSP. In this interface, you can set and query parameters related to the IGP-ISIS. IGP stands for interior gateway protocol and ISIS stands for intermediate system to intermediate system.

Navigation Path

In the NE Explorer, click the NE and choose Configuration > Control Plane Configuration > IGP-ISIS Configuration from the Function Tree.

Guideline

Three features of the IS-IS routing protocol are supported by the equipment, that is, three types of IS-IS routing protocol packets, optimized SPF algorithm, path cost, and IS-IS traffic engineering (IS-IS TE):

Three Types of IS-IS Routing Protocol Packets:
- Hello packets: hello packets are used to construct and maintain neighbor relation between network nodes. Hence, Hello packets are also called IS-to-IS hello (IIH) PDUs.
- Link state PDUs: link state PDUs are used to exchange the link state information. In a network running the IS-IS routing protocol, each network node generates a link state PDU, which contains all the link state information of this network node. To generate its own LSDB, each network node collects all the link state PDUs within the local domain and between domains.
- SNP packets: sequence number PDUs (SNP) describe the link state PDUs in all or part of the LSDB. The SNP is used to synchronize and maintain the LSDB of each network node in the RTN network.
Optimized SPF Algorithm: the IS-IS routing protocol realized by the equipment uses the optimized SPF algorithm for route computation and update. When the topology is changed, the resources (network bandwidth, processing capability of network nodes, and memory) for updating the new route are few, and thus the convergence rate of the entire network is improved.
Path Cost: the equipment supports the manual setting of path cost, and controls the route that the MPLS LSP travels through when it is dynamically created.
IS-IS TE: when the MPLS constructs the LSP, the traffic engineering information of all the links in the local domain should be known. The IS-IS TE realized by the equipment supports the construction of the MPLS LSP. The equipment obtains the traffic engineering information (link utilization and path cost) of all the links in the network through the IS-IS routing protocol. It constructs and synchronizes the TEDB, and uses the constrained shortest path first (CSPF) algorithm used by the TEDB to compute the route that the MPLS LSP travels through.

Buttons

Button	Description
Import	Import the routes found by other routing protocols. Click Import to set related parameters of the routes. NOTICE: When modifying the parameters of the imported routes, click Delete to delete the original settings, and then click Import to re-set. This operation, however, interrupts the services. Thus, exercise caution when performing this operation.

Parameters

**Table 1** Descriptions of the parameters for IGP-ISIS Configuration
Tab	Parameter	Value	Description
Node Configuration	IGP-ISIS Instance ID	1-65535	Specify the ID of an IGP-ISIS instance.
	Node Level	level-1-2	Displays the level for the node on the route in the IS-IS protocol network. If the node level is level-1-2, the node takes part in the route computation of L1 and L2, and also maintains the link state databases (LSDBs) of L1 and L2.
	Area ID	Character string	Set the area ID. The area ID is also the network entity title (NET), which includes the AREA ID and SYSTEM ID of the node. NOTE: The area ID of the node can be a maximum of 26 bytes. Each byte is a hexadecimal integer with the high byte placed first and the low byte placed last. On the U2000 Web LCT, the length of the character string should be an even number.
	LSP Refresh Time (s)	30-65235	Set the time of refreshing the link state packet (LSP). To keep all LSPs in the area synchronous, the router periodically transmits all the current LSPs. The period of transmitting LSPs is the LSP refresh time.
	Maximum LSP Validity (s)	350-65535	Set the maximum period when the LSP is valid. When generating the system LSP, the LSP router writes the life time in the LSP. When any other router receives the LSP, the life time decreases as the time goes. If the router does not receive the updated LSP when the life time of the LSP decreases to 0s, the router directly deletes the LSP from the LSDB. The life time is the maximum LSP validity.
	Management Status	Up, Down	Displays the management status.
	Operating Status	Up, Down	Displays the operation status.
	Route Color	1-16	Set the route color. you can set a maximum of 16 types of route color.
	Time to Tolerance (s)	3 to 3600	Sets and displays the maximum GR session time. When a GR router detects that the opposite router is down, the topology or route information sent by the opposite router is not deleted within the duration of tolerance time.
	Single-Level Recovery Time (s)	3 to 3600	Displays the single-level recovery time.
	Maximum Recovery Time (s)	3 to 65535	Displays the maximum recovery time.
Port Configuration	IGP-ISIS Instance ID	1-65535	Display the ID of an IGP-ISIS instance.
	Port	Example: Slot-Board Name-Port (Port No.)	Display the port where the IS-IS parameters need be set.
	Link Level	level-1-2, level-2	Displays the link level of a port. If the link level is level-1-2, the port can establish both the level-1 neighbor relation and level-2 neighbor relation.
	LSP Retransmission Interval (s)	1-300	Set the interval for retransmission of the LSP. In the case of a point-to-point link, if the local router fails to receive any response in a period after transmitting the LSP, the local router considers that the LSP is lost or discarded. To ensure the transmission reliability, the local router transmits the LSP again.
	Minimum LSP Transmission Interval (ms)	1-65535	Set the minimum interval for transmission of the LSP. To set the interval is to set the minimum delay between two consecutive LSPs.
	Link Overhead	1-16777215	Set the link overhead.
	Authentication Mode	OSI, IP	Set the authentication mode. Authentication configured on the port is used in the Hello packet to confirm the validity and correctness of neighbors.
	Authentication Type	the Mode of MD5 Encryption, No Authentication	Select the authentication type.
	Authentication Key	Example: m3%A	Set the authentication key. NOTE: The authentication key can be set only when the authentication type is the Mode of MD5 Encryption. To ensure the security of the U2000 Web LCT, passwords must be complex enough. For example, a password must contain six or more characters of two types. The allowed characters are digits, letters, and special characters. Remember to change passwords regularly.
	Hello Send Interval (ms)	100-255000	Set the interval for transmitting the hello packets. The IS-IS protocol periodically transmits the hello packets from the port. The router maintains the neighbor relations by transmitting and receiving the hello packets. The interval of transmitting the hello packets can be changed.
	Hello Loss Count	2-100	Set the count of the lost hello packets. The IS-IS protocol maintains the neighbor relations with the neighbor routers by transmitting and receiving the hello packets. If the IS-IS protocol fails to receive the specified count of the consecutive hello packets, the IS-IS protocol considers that the neighbor router fails. The specified count is the hello loss count.
Route Import	IGP-ISIS Instance ID	1-65535	Display the ID of an IGP-ISIS instance.
	Source Route Protocol Type	Static Route	Display the type of the route protocol that imports routes.
	Overhead	1-255	Set the overhead, also the route weight, for the imported route.
	Level	level-1-2	Display the import level of the imported route.
Link TE Information	IGP-ISIS Instance ID	1-65535	Display the ID of an IGP-ISIS instance.
	Level	level-1-2	Display the link level.
	Local Node ID	Example: 10.70.73.22	Display the LSR ID of the local node.
	Local Link IP	Example: 10.70.73.12	Display the IP address of the local link.
	Opposite Node ID	Example: 10.70.73.20	Display the LSR ID of the opposite node.
	Opposite Link IP	Example: 10.70.73.10	Display the IP address of the opposite link.
	Maximum Reserved Bandwidth (kbit/s)	Example: 160000	Display the maximum bandwidth that can be reserved.
	TE Measurement	0-0xFFFFFFFF	Display the TE measurement value.
	Management Group Attribute	0-0xFFFFFFFF	Display the management group attribute.
	Available Bandwidth of Link Priority 0 (kbit/s)	Example: 16000	Display the available bandwidth for link priority 0.
	Available Bandwidth of Link Priority 1 (kbit/s)	Example: 16000	Display the available bandwidth for link priority 1.
	Available Bandwidth of Link Priority 2 (kbit/s)	Example: 16000	Display the available bandwidth for link priority 2.
	Available Bandwidth of Link Priority 3 (kbit/s)	Example: 16000	Display the available bandwidth for link priority 3.
	Available Bandwidth of Link Priority 4 (kbit/s)	Example: 16000	Display the available bandwidth for link priority 4.
	Available Bandwidth of Link Priority 5 (kbit/s)	Example: 16000	Display the available bandwidth for link priority 5.
	Available Bandwidth of Link Priority 6 (kbit/s)	Example: 16000	Display the available bandwidth for link priority 6.
	Available Bandwidth of Link Priority 7 (kbit/s)	Example: 16000	Display the available bandwidth for link priority 7.