Managing IP Connections

With the IP suite that is available in Cisco IOS Software, a number of services are available to help control and manage your IP connections. Internet Control Message Protocol (ICMP) provides many of these services. ICMP does this by sending messages to hosts or other routers when a problem is discovered with the Internet header. For more detailed information about ICMP, refer to RFC 950, “Internet Standard Subnetting Procedure.”

Some of the services that can help you manage various aspects of IP connections include the following:

  • ICMP unreachable messages

  • ICMP redirect messages

  • ICMP mask reply messages

  • IP Path MTU Discovery

  • MTU packet size

  • IP source routing

  • Simplex Ethernet interfaces

  • Director Response Protocol (DRP) server ...

Get CCIE Practical Studies: Security (CCIE Self-Study) now with the O’Reilly learning platform.

O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.

Start your free trial