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-rw-r--r--relay/dhcrelay.817
1 files changed, 16 insertions, 1 deletions
diff --git a/relay/dhcrelay.8 b/relay/dhcrelay.8
index 67065663..1091edb7 100644
--- a/relay/dhcrelay.8
+++ b/relay/dhcrelay.8
@@ -77,6 +77,14 @@ dhcrelay - Dynamic Host Configuration Protocol Relay Agent
.B -i
.I interfaceN
]
+[
+.B -iu
+.I interface0
+[
+.B ...
+.B -iu
+.I interfaceN
+]
.B -l
.I interface
]
@@ -204,12 +212,19 @@ a query that came via a different relay agent. If this option is not
specified, such packets will be relayed anyway.
.TP
-i \fIifname\fR
-Listen for DHCPv4/BOOTP queries on interface \fIifname\fR. Multiple
+Listen for DHCPv4/BOOTP traffic on interface \fIifname\fR. Multiple
interfaces may be specified by using more than one \fB-i\fR option. If
no interfaces are specified on the command line, dhcrelay will identify
all network interfaces, eliminating non-broadcast interfaces if possible,
and attempt to listen on all of them.
.TP
+-iu \fIifname\fR
+Specifies an upstream network interface for DHCPv4 relay mode: an
+interface from which replies from servers and other relay agents will be
+accepted. Multiple interfaces may be specified by using more
+than one \fB-u\fR option. This argument is intended to be used
+in conjunction with one or more -i arguments.
+.TP
-m \fIappend\fR|\fIreplace\fR|\fIforward\fR|\fIdiscard\fR
Control the handling of incoming DHCPv4 packets which already contain
relay agent options. If such a packet does not have \fIgiaddr\fR set in