Service Manual

• MT Reachable IPv6 Prexes TLV — appears for each IPv6 an IS announces for a given MT ID. Its structure is aligned with the
extended IS Reachability TLV Type 236 and add an MT ID.
By default, Dell Networking OS supports dynamic host name exchange to assist with troubleshooting and conguration. By assigning
a name to an IS-IS NET address, you can track IS-IS information on that address easier. Dell Networking OS does not support ISO
CLNS routing; however, the ISO NET format is supported for addressing.
To support IPv6, the Dell Networking implementation of IS-IS performs the following tasks:
• Advertises IPv6 information in the PDUs.
• Processes IPv6 information received in the PDUs.
• Computes routes to IPv6 destinations.
• Downloads IPv6 routes to the RTM for installing in the FIB.
• Accepts external IPv6 information and advertises this information in the PDUs.
The following table lists the default IS-IS values.
Table 21. IS-IS Default Values
IS-IS Parameter Default Value
Complete sequence number PDU (CSNP) interval 10 seconds
IS-to-IS hello PDU interval 10 seconds
IS-IS interface metric 10
Metric style Narrow
Designated Router priority 64
Circuit Type Level 1 and Level 2
IS Type Level 1 and Level 2
Equal Cost Multi Paths 16
Conguration Information
To use IS-IS, you must congure and enable IS-IS in two or three modes: CONFIGURATION ROUTER ISIS, CONFIGURATION
INTERFACE, and ( when conguring for IPv6) ADDRESS-FAMILY mode. Commands in ROUTER ISIS mode congure IS-IS globally,
while commands executed in INTERFACE mode enable and congure IS-IS features on that interface only. Commands in the
ADDRESS-FAMILY mode are specic to IPv6.
NOTE: When using the IS-IS routing protocol to exchange IPv6 routing information and to determine destination
reachability, you can route IPv6 along with IPv4 while using a single intra-domain routing protocol. The conguration
commands allow you to enable and disable IPv6 routing and to congure or remove IPv6 prexes on links.
Except where identied, the commands described in this chapter apply to both IPv4 and IPv6 versions of IS-IS.
Conguration Tasks for IS-IS
The following describes the conguration tasks for IS-IS.
• Enabling IS-IS
• Congure Multi-Topology IS-IS (MT IS-IS)
• Conguring IS-IS Graceful Restart
• Changing LSP Attributes
• Conguring the IS-IS Metric Style
• Conguring IS-IS Cost
• Changing the IS-Type
374
Intermediate System to Intermediate System