Fujitsu Siemens Computers PRIMERGY BX, Description

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Start up and Configuration the Ethernet Switch Module Configuration the Switch Blade Module
Lan Switch and Router Blade
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that apply to packets. When a packet is received on an interface, the switch compares the
fields in the packet against any applied ACLs to verify that the packet has the required
permissions to be forwarded, based on the criteria specified in the access lists. The first match
decides whether the switch accepts or rejects the packets. Because the switch stops testing
after the first match, the order of conditions in the list is critical. If no conditions match, the
switch rejects the packet. If there are no restrictions, the switch forwards the packet; otherwise,
the switch drops the packet. The switch can use ACLs on all packets it forwards, including
packets bridged within a VLAN.
These access lists are supported on Layer 2 interfaces: Standard IP access lists using source
addresses and Extended IP access lists using source and destination addresses and optional
protocol type Information. The switch examines ACLs associated with all inbound features
configured on a given interface and permits or denies packet forwarding based on how the
packet matches the entries in the ACL. In this way, ACLs are used to control access to a
network or to part of a network.
An ACL is a sequential collection of permit and deny conditions. The switch tests packets
against the conditions in an access list . The first match determines whether the switch accepts
or rejects the packet. Because the switch stops testing after the first match, the order of the
conditions is critical. If no conditions match, the switch denies the packet.
The PRIMERGY BX600 supports these types of ACLs or access lists for IP:
• Standard IP access lists use source addresses for matching operations.
• Extended IP access lists use source and destination addresses for matching operations and
optional protocol-type information for finer granularity of control.
Standard ACLs are the oldest type of ACL. Standard ACLs control traffic by comparing the
source address of the IP packets to the addresses configured in the ACLs.
Extended ACLs control traffic by comparing the source and destination addresses of the IP
packets to the addresses configured in the ACLs. Rules can be configured to inspect up to six
fields of a packet: Source IP, Destination IP, Source L4 Port, Destination L4 Port, TOS Byte,
Protocol Number.
Strict scheduling for priority queue
In addition to WRR, PRIMERGY BX600 also supports Strict scheduling ensures that the
highest priority packets will always get serviced first, ahead of all other traffic, and that the other
three queues will be serviced using WRR scheduling
WRR (Weighted Round Robin)
The PRIMERGY BX600 supports Weighted Round Robin (WRR) scheduling. The WRR
queuing algorithm ensures that the lower priority packets are not entirely starved for bandwidth
and are serviced without compromising the priority settings administered by the network
manager
.
Differentiated Services
Network resources are apportioned based on traffic classification and priority, giving
preferential treatment to data with strict timing requirements according to network management
policy. The PRIMERGY BX600 supports the Differentiated Services(Diffserv). The Diffserv is a
method of offering quality-of-service treatment for network traffic without the need for a
resource reservation protocol. An administration specifically provisions the network equipment
to identify the following: The classes of traffic in the network & The QoS treatment the classes
of traffic receive.
Diffserv controls the traffic acceptance throughout the DiffServ domain, the traffic transmission