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@@ -1,10 +1,10 @@
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.TH BRIDGE 3
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.SH NAME
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-bridge \- IPv4 Ethernet bridge
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+bridge \- Ethernet bridge and IPv4 tunnel
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.SH SYNOPSIS
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.nf
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.B bind -a #B\fIb\fP /net
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-
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+.sp 0.4v
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.B /net/bridge\fIb\fP/ctl
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.B /net/bridge\fIb\fP/cache
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.B /net/bridge\fIb\fP/log
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@@ -17,7 +17,7 @@ bridge \- IPv4 Ethernet bridge
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.SH DESCRIPTION
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The
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.I bridge
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-device bridges IPv4 packets amongst Ethernet interfaces.
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+device bridges (copies) packets amongst Ethernet interfaces.
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The number
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.I b
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in the bind is optional and selects a particular bridge
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@@ -58,7 +58,7 @@ Treat the device mounted at
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.I path
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(e.g.,
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.LR /net/ether0 )
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-as an Ethernet medium carrying IPv4 and ARP packets
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+as an Ethernet medium
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and associate it with this bridge (forward its packets to the
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other interfaces associated with this bridge).
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.I Ownhash
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@@ -67,10 +67,10 @@ is an `owner hash'.
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.BI "bind tunnel " "name ownhash path path2
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Treat the device mounted at
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.I path
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-as a network tunnel carrying IPv4 and ARP packets,
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+as a network tunnel (of IPv4 in IPv4),
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the device mounted at
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.I path2
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-as an Ethernet medium carrying IPv4 and ARP packets
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+as an Ethernet medium
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and associate them with this bridge
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(forward its packets to the
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other interfaces associated with this bridge).
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@@ -112,7 +112,7 @@ Set bridge
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The only known option is
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.LR tcpmss ,
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which limits the TCP Maximum Segment Size of
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-TCPv4 packets passing through to 1300 bytes.
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+TCP packets passing through to 1300 bytes.
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.TP
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.BI "clear " option
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Clear bridge
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@@ -168,4 +168,4 @@ echo 'bind ether inner 0 /net/ether1' >/net/bridge0/ctl
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.SH SOURCE
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.B /sys/src/9/port/devbridge.c
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.SH BUGS
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-Doesn't understand IPv6.
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+Understands but won't tunnel nor fragment IPv6.
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