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man: tc-vlan.8: Describe CONTROL option 

This should be made generic and part of a common tc-actions man page.
Though leave it here for now to not confuse readers of the example which
uses it.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
This commit is contained in:
Phil Sutter 2016-03-22 15:48:39 +01:00 committed by Stephen Hemminger
parent 51011dac36
commit 16418561b7
1 changed files with 55 additions and 1 deletions
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56
man/man8/tc-vlan.8
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@ -6,13 +6,17 @@ vlan - vlan manipulation module
.in +8
.ti -8
.BR tc " ... " "action vlan" " { " pop " |"
.IR PUSH " }"
.IR PUSH " } [ " CONTROL " ]"
.ti -8
.IR PUSH " := "
.BR push " [ " protocol
.IR VLANPROTO " ]"
.BI id " VLANID"
.ti -8
.IR CONTROL " := { "
.BR reclassify " | " pipe " | " drop " | " continue " | " pass " }"
.SH DESCRIPTION
The
.B vlan
@ -50,5 +54,55 @@ for hexadecimal interpretation, etc.).
.BI protocol " VLANPROTO"
Choose the VLAN protocol to use. At the time of writing, the kernel accepts only
.BR 802.1Q " or " 802.1ad .
.TP
.I CONTROL
How to continue after executing this action.
.RS
.TP
.B reclassify
Restarts classification by jumping back to the first filter attached to this
action's parent.
.TP
.B pipe
Continue with the next action, this is the default.
.TP
.B drop
Packet will be dropped without running further actions.
.TP
.B continue
Continue classification with next filter in line.
.TP
.B pass
Return to calling qdisc for packet processing. This ends the classification
process.
.RE
.SH EXAMPLES
The following example encapsulates incoming ICMP packets on eth0 from 10.0.0.2
into VLAN ID 123:
.RS
.EX
#tc qdisc add dev eth0 handle ffff: ingress
#tc filter add dev eth0 parent ffff: pref 11 protocol ip \\
u32 match ip protocol 1 0xff flowid 1:1 \\
u32 match ip src 10.0.0.2 flowid 1:1 \\
action vlan push id 123
.EE
.RE
Here is an example of the
.B pop
function: Incoming VLAN packets on eth0 are decapsulated and the classification
process then restarted for the plain packet:
.RS
.EX
#tc qdisc add dev eth0 handle ffff: ingress
#tc filter add dev $ETH parent ffff: pref 1 protocol 802.1Q \\
u32 match u32 0 0 flowid 1:1 \\
action vlan pop reclassify
.EE
.RE
.SH SEE ALSO
.BR tc (8)