#19105: Allow for more flexible port mirroring on ar8xxxx switches
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Reporter: squidevil | Owner: developers
Type: enhancement | Status: new
Priority: normal | Milestone: Barrier Breaker 14.07
Component: base system | Version: Trunk
Keywords: switch, mirror |
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The current mirror_monitor_port/mirror_source_port feature in the ar8216.c
driver for ar8216 and ar8327 network switches isn't as flexible as the
base hardware allows. Currently, mirroring is restricted to packets
rx/tx/both at one port to one other port. The switch itself allows the
tx/rx from any combination of ports to be mirrored to the monitor_port.
I've pulled together a patch for the ar8216.c driver that enables this.
Commands like this can now be run, which mirrors any packet received on
port 4 or port 5 to port 0:
{{{
swconfig dev switch0 set mirror_monitor_port 0
swconfig dev switch0 port 4 set enable_mirror_rx 1
swconfig dev switch0 port 5 set enable_mirror_rx 1
}}}
Corresponding changes to the network switch setup bash scripts would need
to be made as well.
It looks like the source_port/mirror_port concept came from the
rtl8366rb.c driver, whose hardware appears to only support the single
source port. I elected not to support the older mirror_source_port (and
its associated switch-level enable_mirror_rx/enable_mirror_tx options).
It would be fairly easy to add those back into the driver and support both
syntaxes, but I thought it important to get this request looked at before
bothering with the additional work. I'll let the other
maintainers/developers provide an opinion, first.
--
Ticket URL: <https://dev.openwrt.org/ticket/19105>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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