diff options
Diffstat (limited to 'relay/dhcrelay.8')
| -rw-r--r-- | relay/dhcrelay.8 | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/relay/dhcrelay.8 b/relay/dhcrelay.8 index 675ed01d..67065663 100644 --- a/relay/dhcrelay.8 +++ b/relay/dhcrelay.8 @@ -80,6 +80,9 @@ dhcrelay - Dynamic Host Configuration Protocol Relay Agent .B -l .I interface ] +.B -U +.I interface +] .I server0 [ .I ...serverN @@ -217,7 +220,7 @@ packet, leaving the supplied option field intact; it may \fIreplace\fR the existing agent option field; it may \fIforward\fR the packet unchanged; or, it may \fIdiscard\fR it. .TP --u \fIifname\fR +-U \fIifname\fR Enables the addition of a RFC 3527 compliant link selection suboption for clients directly connected to the relay. This RFC allows a relay to specify two different IP addresses: one for the server to use when @@ -242,7 +245,7 @@ This option is off by default. Note that enabling this option automatically enables the \fB-a\fR option. Keep in mind that using options such as \fB-m replace\fR or \fB-m discard\fR -on relays upstream from one using \fB-u\fR can pose problems. The upstream +on relays upstream from one using \fB-U\fR can pose problems. The upstream relay will wipe out the initial agent option containing the link selection while leaving the re-purposed giaddr value in place, causing packets to go astray. |