Broadcom TD3, TH3 Packet Slicing feature

Note: TD3 platforms support only fixed-byte payload truncation; they always egress 192 bytes after truncation, for both IPv4 and IPv6 traffic

Broadcom TH3 device - DS4000 supports only fixed-byte payload truncation; they always egress 214 bytes after truncation, for both IPv4 and IPv6 traffic

• The feature is supported only in BCM ADV License

• Supported in all BCM TD3 devices - Dell5248, 5232, DS2000, DS1000, EC7326, EC7726, EC5835, DS3000

• A maximum of 4 truncate(packet slicing) config is supported.

• An interface cannot be configured as both a packet-truncate destination interface and a flow tool port, override-to port

• An interface cannot be configured as both a packet-truncate destination interface and tunnel interface

Reference

Command	packet-truncate <id> source-interfaces <Ethernet,Ethernet> destination-interface <Ethernet/port-channel> no packet-truncate <id>
Description	Truncate packets after offset
Parameters	Offset-value – 192 bytes[fixed] TD3 Offset-value – 214 bytes[fixed] TH3
Mode	Global

Example

#Add truncate
pbnoscli# config terminal
pbnoscli(config)# packet-truncate <id> source-interfaces <Ethernet,Ethernet> destination-interface <Ethernet/port-channel>
pbnoscli(config)# end

You can verify the configuration by using the command(s) below:

pbnoscli# sh running-config 
configure terminal
!
packet-truncate 1 source-interfaces Ethernet3/1,Ethernet4/1 destination-interface port-channel5
!
pbnoscli# 

#Delete truncate
pbnoscli# config terminal
pbnoscli(config)# no packet-truncate <id>
pbnoscli(config)# end