Hello, I have two interfaces. The rl0 is for monitoring purposes and fxp0 is for normal internet access. rl0 is attached to a catalyst port using SPAN, meaning all the traffic going to the internet gets mirrored to this port. fxp0 is on the same catalyst.
If I shutdown rl0 then I can access fxp0 from the outside, but if I ifconfig rl0 up then I am just allowed to access fxp0 within machines in the 196.12.X.0 network.
rl0: flags=8802<BROADCAST,SIMPLEX,MULTICAST> mtu 1500 inet 10.0.0.1 netmask 0xa0000fc broadcast 255.255.255.3 inet6 fe80::2e0:7dff:fed0:fdf4%rl0 prefixlen 64 scopeid 0x1 ether 00:e0:7d:d0:fd:f4 media: Ethernet autoselect (100baseTX <full-duplex>) status: active
if this is just for monitoring with SPAN, you shouldn't give it an address at all. just bring it up.
i also suggest locking your interfaces and switch ports to their respective speed and duplex.
you will see improvements in performance.
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