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BigIron RX Series Configuration Guide
867
53-1002253-01
Chapter
28
Configuring 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 Brocade 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.
•
RFC 2763 – “Dynamic Host Name Exchange Mechanism for IS-IS”, 2000.
•
RFC 2966 – “Domain-wide Prefix Distribution with Two-Level IS-IS”, 2000
•
Portions of the Internet Draft “IS-IS extensions for Traffic Engineering”
draft-ieff-isis-traffic-02.txt (dated 2000) that describe the Extended IP reachability TLV (TLV
type 135) and the extended Intermediate System (IS) reachability TLV (TLV type 22). These
portions provide support for the wide metric version of IS-IS. No other portion is supported on
Brocade’s implementation of IS-IS.
NOTE
The BigIron RX does not support routing of Connectionless-Mode Network Protocol (CLNP) packets.
The device uses IS-IS for TCP/IP only.
Relationship to IP route table
The IS-IS protocol has the same relationship to the device’s IP route table that OSPF has to the IP
route table. The IS-IS routes are calculated and first placed in the IS-IS route table. The routes are
then transferred to the IP route table.
The protocol sends the best IS-IS path for a given destination to the IP route table for comparison to
the best paths from other protocols to the same destination. The CPU selects the path with the
lowest administrative distance and places that path in the IP route table.
Summary of Contents for BigIron RX Series
Page 228: ...152 BigIron RX Series Configuration Guide 53 1002253 01 Enabling WAN PHY mode support 6 ...
Page 312: ...236 BigIron RX Series Configuration Guide 53 1002253 01 Displaying IP information 7 ...
Page 356: ...280 BigIron RX Series Configuration Guide 53 1002253 01 Resetting LLDP statistics 9 ...
Page 402: ...326 BigIron RX Series Configuration Guide 53 1002253 01 Transparent firewall mode 11 ...
Page 432: ...356 BigIron RX Series Configuration Guide 53 1002253 01 SuperSpan 12 ...
Page 500: ...424 BigIron RX Series Configuration Guide 53 1002253 01 MRP CLI example 14 ...
Page 591: ...BigIron RX Series Configuration Guide 515 53 1002253 01 Displaying traffic reduction 19 ...
Page 592: ...516 BigIron RX Series Configuration Guide 53 1002253 01 Displaying traffic reduction 19 ...
Page 598: ...522 BigIron RX Series Configuration Guide 53 1002253 01 Viewing Layer 2 ACLs 20 ...
Page 656: ...580 BigIron RX Series Configuration Guide 53 1002253 01 Trunk formation 22 ...
Page 754: ...678 BigIron RX Series Configuration Guide 53 1002253 01 Displaying RIP filters 24 ...
Page 814: ...738 BigIron RX Series Configuration Guide 53 1002253 01 Displaying OSPF information 25 ...
Page 980: ...904 BigIron RX Series Configuration Guide 53 1002253 01 Clearing IS IS information 28 ...
Page 1000: ...924 BigIron RX Series Configuration Guide 53 1002253 01 Using secure copy 30 ...
Page 1088: ...1012 BigIron RX Series Configuration Guide 53 1002253 01 IP source guard 35 ...
Page 1108: ...1032 BigIron RX Series Configuration Guide 53 1002253 01 Reading CDP packets 37 ...
Page 1126: ...1050 BigIron RX Series Configuration Guide 53 1002253 01 Clearing sFlow statistics 39 ...
Page 1324: ...1248 BigIron RX Series Configuration Guide 53 1002253 01 Displaying OSPFv3 information 48 ...
Page 1363: ...BigIron RX Series Configuration Guide 1287 53 1002253 01 Continuous System Monitor 51 ...
Page 1364: ...1288 BigIron RX Series Configuration Guide 53 1002253 01 Continuous System Monitor 51 ...
Page 1404: ...1328 BigIron RX Series Configuration Guide 53 1002253 01 Commands That Require a Reload D ...
Page 1458: ...1382 BigIron RX Series Configuration Guide 53 1002253 01 VSRP E ...