Silicom Ltd. Connectivity Solutions

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Director

– Load balancing

Silicom’s 10 Gigabit Ethernet content aware director provides a load balancing of the traffic coming from the 4 x 10G

external ports (0,2,4 and 6). The traffic is balanced, based on a defined hash configuration (5 tuple or other), to the 4x

10G internal interfaces ( 1,3,5 and 7)that are going to the host

Director: Rules Classification and capabilities

Director Capabilities

The Redirector supports the following capabilities:



Maximum total number of rules is 16K



Each of the 16K rules can be defined to any port the on board multi-layer switch



Each rule refers to incoming packet



Rules are executed per order. First rule that matches will be executed



Rules can be added and removed on the fly



Each rule can include one or more classification fields. A rule match will be when all fields defined are match



Each field can have a bit masking to check part of the classification field



Per port statistics can be read, like packets count, errors, VLAN, and more



Rules and action are done in wire speed at any packet size

Rules classification fields

Rules classification is done based on the first 128 bytes of the packets. The following list provides rules classification

fields



MAC address, source & destination



IPv4

– source & destination IP



IPv6

– source & destination IP



L4 Port

– source & destination port



Ethernet Protocol

– ethertype



IP Protocol num



VLAN ID tagging



User defined fields



DSCP

– match the different services code point – the six most significant bits of the Type of Service octet (IPv4) or

Traffic Class octet (IPv6).*



IPv6 Flow Label*



IP length*



ISL Frame Type*



ISL USER*



Source & destination port range*



VLAN priority*



VLAN tag type*



TCP flags*



TOS

– match Type of Service octet (IPv4) or Traffic Class octet (IPv6)*



TTL field in a IPv4 header or Hop Limit in a IPv6 header*



*Future SW supports