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- If you set a JumboFrame, it will be unable to transmit and receive the data of IEEE802.3 form.
- If you use two or more cards, or VLAN interfaces, enabling JumboFrame function becomes
effective to all cards and all interfaces.
- When you perform file transfer by FTP, please set MTU size to less than 8232byte.
- Please use Jumbo Frames function only in 1000 Mbps communication. If you use Jumbo Frames in
10 Mbps or 100 Mbps, you won't be able to use the Jumbo Frame function.
4.3.2.3 To use ndd(1M) Utility
By using the ndd command, mode of operation can be changed dynamically.
Below shows how to reference and set each parameter by ndd command with examples.
Reference:
ndd -get /dev/fjgi 'param' (param: each parameter)
example) # ndd -get /dev/fjgi 'link_status'
Settings:
ndd -set /dev/fjgi 'param' value (param: each parameter, value: each
value)
example1) # ndd -set /dev/fjgi 'instance' 2
example2) # ndd -set /dev/fjgi 'adv_autoneg_cap' 0
To reflect the changed setting:
ndd -set /dev/fjgi 'instance' value
(Set the relevant interface instance number.)
ndd -set /dev/fjgi 'adv_autoneg_cap' 0
(Once, turn off the function of AutoNegotiation.)
ndd -set /dev/fjgi 'adv_autoneg_cap' 1
(Then, turn on the function of AutoNegotiation.)
example) In case, to set the setting of fjgi0 1000Full => 100Half.
# ndd -set /dev/fjgi 'instance' 0
# ndd -set /dev/fjgi 'adv_1000fdx_cap' 0
# ndd -set /dev/fjgi 'adv_1000hdx_cap' 0
# ndd -set /dev/fjgi 'adv_100fdx_cap' 0
# ndd -set /dev/fjgi 'adv_autoneg_cap' 0
# ndd -set /dev/fjgi 'adv_autoneg_cap' 1
A list of parameter can be used with ndd command.
Table 4.2 A list of parameters
Parameter Status Meaning
? Read only Display parameter list
link_status Read only 0 : Link down
1 : Link up
link_speed Read only 1000 : 1000Mbps
100 : 100Mbps
10 : 10Mbps
link_mode Read only 0 : Half Duplex communication
1 : Full Duplex communication
autonego Read only 0 : Autonegotiation is Off.
1 : Auotnegotiation is On.