IP Router Configuration 
Router Configuration Guide 91
— multiplier multiplier
—no multiplier
— [no] type cpm-np
Router L2TP Commands
The router L2TP commands apply only to the 7750 SR and 7450 ESS.
config
— router [router-name]
— l2tp
— calling-number-format ascii-spec
—no calling-number-format
— challenge {always}
—no challenge
— df-bit-lac {always | never}
—no df-bit-lac
— destruct-timeout destruct-timeout
—no destruct-timeout
— exclude-avps calling-number
—no exclude-avps
— group tunnel-group-name [create] 
—no group tunnel-group-name
— avp-hiding {sensitive | always}
—no avp-hiding
— challenge [always]
—no challenge
— description description-string
—no description
— df-bit-lac {always | never | default}
—no df-bit-lac
— destruct-timeout destruct-timeout
—no destruct-timeout
— hello-interval hello-interval
—no hello-interval
— idle-timeout idle-timeout
—no idle-timeout
— lns-group lns-group-id
—no lns-group
— load-balance-method {per-session | per-tunnel}
—no load-balance-method
— local-address ip-address
—no local-address
— local-name host-name
—no local-name
— max-retries-estab max-retries
—no max-retries-estab
— max-retries-not-estab max-retries
—no max-retries-not-estab
— password password [hash | hash2]
—no password