Icmp Redirect; Quality Of Service; Ip Routing Policies; Dynamic Host Configuration Protocol (Dhcp) - 3Com corebuilder 3500 Implementation Manual

ICMP Redirect

Quality of Service

IP Routing Policies

Dynamic Host
Configuration
Protocol (DHCP)
Standards,
Protocols, and
Related Reading
Using ICMP Redirect in conjunction with VRRP might cause gateway
access problems due to potential conflicts between actual MAC
addresses and the virtual MAC addresses that VRRP uses. Disable ICMP
Redirect if you are using VRRP.
You can enable Quality of Service (QoS) to run on systems running the
VRRP protocol. As with the case of dynamic routing protocols, however,
you must configure QoS parameters consistently across the routing
interfaces on the same subnetwork.
Also, periodically examine how QoS uses the route cache because the
cache may fill up faster in a VRRP environment. Consider classifying
specific port ranges in this case.
If you are using IP routing policies to control traffic on your network you
must apply the same rate limits to all virtual routers on the LAN, Master as
well as Backups. Failure to match routing policies among all virtual routers
on the LAN could, for example, leave some routing destinations
unreachable.
Consider using VRRP if your network uses the Dynamic Host
Configuration Protocol (DHCP). DHCP provides for a default gateway and
an end-host IP address, and therefore is at risk to be a single point of
failure. Configure DHCP exactly the same across all the virtual routers on
the LAN.
The Virtual Router Redundancy Protocol is defined in the IETF Request For
Comment document (RFC) 2338. RFC2338 can be found at the following
site:
http://www.ietf.cnri.reston.va.us/rfc/rfc2338.txt
The IANA (Internet Assigned Numbers Authority), assigns and maintains
lists of all assigned numbers used for operation of the Internet (protocol
type, Ethernet codes, PPP codes, IP port numbers, ICMP parameters, IP
Multicast addresses, HTTP parameters, IEEE 802 numbers, and so forth).
The "Directory of General Assigned Numbers" can be found at the
following site:
http://www.iana.org/numbers.html

Standards, Protocols, and Related Reading

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