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Diffstat (limited to 'doc/net.example.Linux.in')
| -rw-r--r-- | doc/net.example.Linux.in | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/net.example.Linux.in b/doc/net.example.Linux.in index 0ee83a6e..d48983ee 100644 --- a/doc/net.example.Linux.in +++ b/doc/net.example.Linux.in @@ -1102,6 +1102,16 @@ # # ${IFACE} is set to the interface being brought up/down # ${IFVAR} is ${IFACE} converted to variable name bash allows +# +# For historical & compatbility reasons, preup is actually normally called in +# the follow sequence: up ; preup ; up +# In that case, the first up causes the kernel to initialize the device, so +# that it is available for use in the preup function. However, for some other +# hardware, eg CAN devices, some configuration is needed before trying to up +# the interface will actually work. For such harware, there are the +# 'up_before_preup' variables, that skips the first up call. +#up_before_preup_IFVAR=no +#up_before_preup=no #preup() { # # Test for link on the interface prior to bringing it up. This |