Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) User Manual

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Multi-Service IronWare Routing Configuration Guide

53-1003033-02

IS-IS (IPv4)

The Intermediate System to Intermediate System (IS-IS) protocol is a link-state Interior Gateway
Protocol (IGP) that is based on the International Standard for Organization/International
Electrotechnical Commission (ISO/IEC) Open Systems Internet Networking model (OSI). In IS-IS, an
intermediate system (router) is designated as either a Level 1 or Level 2 router. A Level 1 router
routes traffic only within the area in which the router resides. A Level 2 router routes traffic
between areas within a routing domain.

The implementation of IS-IS is based on the following specifications and draft specifications:

•

ISO/IEC 10589 – “Information Technology – Telecommunication and information exchange
between systems – Intermediate system to Intermediate system intra-domain routing
information exchange protocol for use in conjunction with the protocol for providing the
connection less-mode Network Service (ISO 8473)”, 1992

•

ISO/IEC 8473 – “Information processing systems – Data Communications – Protocols for
providing the connectionless-mode network service”, 1988

•

ISO/IEC 9542 – “Information Technology – Telecommunication and information exchange
between systems – End system to Intermediate system intra-domain routing information
exchange protocol for use in conjunction with the protocol for providing the connection
less-mode Network Service (ISO 8473)”, 1988

•

RFC 1195 – “Use of OSI IS-IS for Routing in TCP/IP and Dual Environments”, 1990.

Priority for
Designated IS
Election

Yes Yes

Yes

Limiting Access
to Adjacencies
With a Neighbor

Yes Yes

Yes

Changing the
IS-IS Level on
an Interface

Yes Yes

Yes

Disabling and
Enabling Hello
Padding on an
Interface

Yes Yes

Yes

Displaying IPv4
IS-IS
Information

Yes Yes

Yes

IS-IS SPF
Scaling

Yes Yes

Disabling and
enabling IS-IS
graceful restart
helper mode for
IPv4 and IPv6

Yes

TABLE 37

Supported Brocade IPv4 IS-IS features (Continued)

Features
supported

Brocade
NetIron XMR
Series

Brocade
MLX Series

Brocade
NetIron CES
2000 Series
BASE
package

Brocade
NetIron CES
2000 Series
ME_PREM
package

Brocade
NetIron CES
2000 Series
L3_PREM
package

Brocade
NetIron CER
2000 Series
Base
package

Brocade
NetIron CER
2000 Series
Advanced
Services
package