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11.4 Routing Functions
The Multiprotocol Interconnect module supports the following routing protocols:
•
IP
•
IPX
•
DECnet Phase IV
11.4.1 IP Routing Support
When acting as an IP router, the Multiprotocol Interconnect module provides
support for:
•
Directed broadcast
•
ICMP
•
Proxy ARP
•
Ethernet or 802.3 (not both) encapsulation on LAN interface
•
Datagram fragmentation/reassembly support
•
IP security
•
Boothelper
•
Static routes
•
Dynamic routes
− RIP
− OSPF
11.4.1.1 RIP Implementation
The following is a summary of the RIP implementation in the Multiprotocol
Interconnect module:
•
Routing messages are broadcast every 30 seconds.
•
Triggered updates are sent.
•
″Split horizon with poison reverse″ is always used.
•
Host level routing is supported (with future WAN I/O cards).
•
RIP can be enabled/disabled on a per logical port basis.
•
RIP can be enabled/disabled globally.
•
Path cost can be configured on each logical port.
•
Routing table entries are aged-out to ensure validity of routes.
•
Can pass or block datagrams according to user defined security access list.
11.4.1.2 OSPF Implementation
The following is a summary of the OSPF implementation in the Multiprotocol
Interconnect module:
•
Only topology changes are broadcast as per OSPF Specification Version 2
(RFC 1247).
•
Supports alternate routes based on IP Type Of Service (TOS).
•
Supports multiple paths with equal costs.
Chapter 11. 8260 Multiprotocol Interconnect Module 245