Packet Encoders

LxGUARD core family is designed for use in network appliances in “repeater” mode. Glueless and simple serial attachment of the core in Ethernet datapath at Media Independent Interface level provides “on-the-fly” encoding operation with minimum latency.

L1GUARD manipulates the data on physical level while maintaining required timing and protocol parameters compliancy. The encoding is applied to all valid data frame fields including CRC.

L2GUARD operates at Layer 2 while preserving MAC header and recalculating of packet CRC. VLAN tagged frames as well as Q-in-Q (double-tag) are supported along with transparent retransmit  of ARP and STP packets. A special user-defined set of additional transparent protocols (based on Ethertype decoding) can be applied in order to support MPLS, OSPF, RSVP, RIP, etc.

Jumbo frames support implies basic Layer 2 encoding only (without Ethertype decoding) but is available on customer request.