Alcatel OS6400-24 Betriebsanweisung PDF herunterladen (Seite 18)

August 2008

Page 18 of 55 OmniSwitch 6400------ Release 6.3.3.R01

When DHCP Snooping is enabled at the switch level or for an individual VLAN, DHCP Snooping func-

tionality is automatically applied to Layer 2 traffic. When DHCP Snooping is disabled at the switch level

or disabled on the last VLAN to have snooping enabled on the switch, DHCP Snooping functionality is no

longer applied to Layer 2 or Layer 3 traffic.

DNS Client

A Domain Name System (DNS) resolver is an internet service that translates host names into IP addresses.

Every time you enter a host name, a DNS service must look up the name on a server and resolve the name

to an IP address. You can configure up to three domain name servers that will be queried in turn to resolve

the host name. If all servers are queried and none can resolve the host name to an IP address, the DNS fails.

If the DNS fails, you must either enter an IP address in place of the host name or specify the necessary

lookup tables on one of the specified servers.

Dynamic VLAN Assignment (Mobility)

Dynamic assignment applies only to mobile ports and requires the additional configuration of VLAN rules.

When traffic is received on a mobile port, the packets are examined to determine if their content matches

any VLAN rules configured on the switch. Rules are defined by specifying a port, MAC address, protocol,

network address, binding, or DHCP criteria to capture certain types of network device traffic. It is also

possible to define multiple rules for the same VLAN. A mobile port is assigned to a VLAN if its traffic

matches any one VLAN rule.

End User Partitioning (EUPM)

EUPM is used for customer login accounts that are configured with end-user profiles (rather than func-

tional privileges specified by partitioned management). Profiles specify command areas as well as VLAN

and/or port ranges to which the user has access. These profiles are typically used for end users rather than

network administrators.

Ethernet Interfaces

Ethernet and Gigabit Ethernet port software is responsible for a variety of functions that support Ethernet

and Gigabit Ethernet. These functions include initialization of ports, notifying other software modules

when a port goes down, configuration of basic line parameters, gathering of statistics for Ethernet and

Gigabit Ethernet ports, and responding to administrative enable/disable requests.

Configurable parameters include: autonegotiation (copper ports 10/100/1000), trap port link messages,

flood control, line speed, duplex mode, inter-frame gap, resetting statistics counters, and maximum and

peak flood rates.

Flood control is configurable on ingress interfaces (flood rate and including/excluding multicast).

Ethernet OAM

Ethernet OAM (Operation, Administration, and Maintenance) provides service assurance over a

converged Ethernet network. Ethernet OAM focuses on two main areas that are most in need by service

providers and are rapidly evolving in the standards bodies: Service OAM and Link OAM. These two OAM

protocols have unique objectives but are complementary to each other. Service OAM provides monitoring

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Alcatel OS6400-24 Betriebsanweisung Seite 18