Dell PowerConnect 5448 User's Guide - Page 116

ICMP Error Rate Limit Bucket Size, ICMP Error Rate Limit Interval

Page 116 highlights

• Autoconfiguration - Specifies whether IPv6 address assignment on an interface is done by stateless autoconfiguration. When enabled, the router solicitation ND procedure is initiated (to discover a router in order to assign an IP address to the interface based on prefixes received with RA messages). When autoconfiguration is disabled, no automatic assignment of IPv6 Global Unicast addresses is performed, and existing automatically assigned IPv6 Global Unicast addresses are removed from the interface. Default is Enabled. • Send ICMP Unreachable - Specifies whether transmision of ICMPv6 Address Unreachable messages is enabled. When enabled, unreachable messages are generated for any packet arriving on the interface with unassigned TCP/UDP port. Default is Enabled. • ICMP Error Rate Limit Interval - The rate-limit interval for ICMPv6 error messages in milliseconds. The value of this parameter together with the Bucket Size parameter (below) determines how many ICMP error messages may be sent per time interval. For example, a rate-limit interval of 100 ms and a bucket size of 10 messages translates to 100 ICMP error messages per second. • ICMP Error Rate Limit Bucket Size - The bucket size for ICMPv6 error messages. The value of this parameter together with the Interval parameter (above) determines how many ICMP error messages may be sent per time interval. For example, a rate-limit interval of 100 ms and a bucket size of 10 messages translates to 100 ICMP error messages per second. Default is 100 ICMP error messages per second; this corresponds to the default interval of 100 ms multiplied by the default bucket size of 10. • IPv6 Address - Indicates the IPv6 address assigned to the interface. The address must be a valid IPv6 address, specified in hexadecimal using 16-bit values between colons. An example of an IPv6 address is 2031:0:130F:0:0:9C0:876A:130D and the compressed version is represented as 2031::0:9C0:876A:130D. Up to five IPv6 addresses (not including Link Local addresses) can be set per interface, with the limitation of up to 128 addresses per system. • Prefix - Specifies the length of the IPv6 prefix. The length is a decimal value that indicates how many of the high-order contiguous bits of the address comprise the prefix (the network portion of the address). The Prefix field is applicable only on a static IPv6 address defined as a Global IPv6 address. • IPv6 Address Type - Specifies the means by which the IP address was added to the interface. The possible field values are: - Link Local - Indicates the IP address is link local; non-routable and can be used for communication on the same network only. A Link Local address has a prefix of 'FE80'. - Global Unicast - Indicates the IP address is a globally unique IPv6 unicast address; visible and reachable from different subnets. - Global Anycast - Indicates the IP address is a globally unique IPv6 anycast address; visible and reachable from different subnets. - Multicast - Indicates the IP address is multicast. 116 Configuring System Information

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116
Configuring System Information
Autoconfiguration
— Specifies whether IPv6 address assignment on an interface is done by stateless
autoconfiguration. When enabled, the router solicitation ND procedure is initiated (to discover a
router in order to assign an IP address to the interface based on prefixes received with RA messages).
When autoconfiguration is disabled, no automatic assignment of IPv6 Global Unicast addresses is
performed, and existing automatically assigned IPv6 Global Unicast addresses are removed from the
interface. Default is
Enabled
.
Send ICMP Unreachable
— Specifies whether transmision of ICMPv6 Address Unreachable messages
is enabled. When enabled, unreachable messages are generated for any packet arriving on the interface
with unassigned TCP/UDP port. Default is
Enabled
.
ICMP Error Rate Limit Interval
— The rate-limit interval for ICMPv6 error messages in milliseconds.
The value of this parameter together with the Bucket Size parameter (below) determines how many
ICMP error messages may be sent per time interval. For example, a rate-limit interval of 100 ms and a
bucket size of 10 messages translates to 100 ICMP error messages per second.
ICMP Error Rate Limit Bucket Size
— The bucket size for ICMPv6 error messages. The value of this
parameter together with the Interval parameter (above) determines how many ICMP error messages
may be sent per time interval. For example, a rate-limit interval of 100 ms and a bucket size of
10 messages translates to 100 ICMP error messages per second. Default is 100 ICMP error messages
per second; this corresponds to the default interval of 100 ms multiplied by the default bucket size of 10.
IPv6 Address
— Indicates the IPv6 address assigned to the interface. The address must be a valid
IPv6 address, specified in hexadecimal using 16-bit values between colons. An example of an
IPv6 address is 2031:0:130F:0:0:9C0:876A:130D and the compressed version is represented as
2031::0:9C0:876A:130D. Up to five IPv6 addresses (not including Link Local addresses) can be set per
interface, with the limitation of up to 128 addresses per system.
Prefix
— Specifies the length of the IPv6 prefix. The length is a decimal value that indicates how many
of the high-order contiguous bits of the address comprise the prefix (the network portion of the
address). The Prefix field is applicable only on a static IPv6 address defined as a Global IPv6 address.
IPv6 Address Type
— Specifies the means by which the IP address was added to the interface.
The possible field values are:
Link Local
— Indicates the IP address is link local; non-routable and can be used for
communication on the same network only. A Link Local address has a prefix of 'FE80'.
Global Unicast
— Indicates the IP address is a globally unique IPv6 unicast address; visible and
reachable from different subnets
.
Global Anycast
— Indicates the IP address is a globally unique IPv6 anycast address; visible and
reachable from different subnets
.
Multicast
— Indicates the IP address is multicast.