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40 lines
1.2 KiB
Markdown
40 lines
1.2 KiB
Markdown
# Mirroring
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The RTL827x provides support to mirror packages from a number of ports to a mirroring
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ports. For each mirrored port it is possible to define whether received, transmitted
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or both types of packages are being mirrored.
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## Mirroring control
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Mirroring is enabled by setting RTL837x_MIRROR_CTRL(0x6048):
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```
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RTL837x_MIRROR_CTRL = port << 1 | 0x1
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```
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Ports are numbered 0-9, 9 being the CPU-port.
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Mirroring is stopped by writing 0 to this register.
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The mirrored ports are configured in RTL837x_MIRROR_CONF(0x604c):
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```
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RTL837x_MIRROR_CONF = RRRR TTTT
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RRRR: 16 bit mask for ports where received packets are mirrored
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TTTT: 16 bit mask for ports where transmitted packets are mirrored
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```
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## Mirroring API
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The code currently provides the following functions:
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```
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void port_mirror_set(register uint8_t port, __xdata uint16_t rx_pmask, __xdata uint16_t tx_pmask) __banked
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void port_mirror_del(void)
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```
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# Mirroring on the Serial Console
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For testing the following commands are provided on the serial console:
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```
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mirror <mirroring port> <P1>[r|t] [P2][r|t] ...
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mirror to port <mirroring port>, source ports are P1 with the givent packet types, P2 and so on
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mirror d
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Deletes mirroring configuration
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```
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