{ "l2tp-server": [] }

Attribute	Description	Default
name	Mandatory L2TP LNS server hostname (AVP 7)
address	Mandatory L2TP server address
secret	Tunnel secret
receive-window-size	Control messages receive window size	4
max-retry	Control messages max retry	30
congestion-mode	Control messages congestion mode	default
data-control-priority	Set the priority bit in the L2TP header for all non-IP data packets (LCP, IPCP, …)	false
data-length	Set length bit for all data packets	false
data-offset	Set offset bit with offset zero for all data packets	false
control-tos	L2TP control traffic (SCCRQ, ICRQ, …) TOS priority	0
data-control-tos	Set the L2TP tunnel TOS priority (outer IPv4 header) for all non-IP data packets (LCP, IPCP, …)	0

The BNG Blaster supports different congestion modes for the reliable delivery of control messages. The default mode is described in RFC2661 appendix A (Control Channel Slow Start and Congestion Avoidance). The mode slow uses a fixed control window size of 1 where aggressive sticks to max permitted based on peer received window size.