query in ISC DHCP relay ??
ameen.shajahan at wipro.com
ameen.shajahan at wipro.com
Fri Jul 6 11:49:55 UTC 2012
Hi all,
I have client , server and relay.
I am running relay as
./dhcrelay -4 -d 10.140.185.183 (without mentioning any interface)
Relay contains two interfaces eth1 and one virtual interface.
Set up is relay will forward the packets over the air and reach the station where the server is running
Output in relay side:
# ./dhcrelay -4 -d -i 10.140.185.183
# Internet Systems Consortium DHCP Relay Agent 4.2.3
Copyright 2004-2011 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/eth1/00:60:43:80:41:7f
Sending on LPF/eth1/00:60:43:80:41:7f
Sending on Socket/fallback
Forwarded BOOTREQUEST for 00:10:5a:6e:94:01 to 10.140.185.183
Forwarded BOOTREQUEST for 00:10:5a:6e:94:01 to 10.140.185.183
Forwarded BOOTREQUEST for 00:10:5a:6e:94:01 to 10.140.185.183
Forwarded BOOTREQUEST for 00:10:5a:6e:94:01 to 10.140.185.183
Ifconfig in relay side:
# ifconfig
eth1 Link encap:Ethernet HWaddr 00:60:43:80:41:7F
inet addr:20.20.20.75 Bcast:20.20.20.255 Mask:255.255.255.0
inet6 addr: fe80::260:43ff:fe80:417f/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1504 Metric:1
RX packets:24143566 errors:0 dropped:0 overruns:0 frame:0
TX packets:4776987 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:256
RX bytes:1825851702 (1.7 GiB) TX bytes:298461678 (284.6 MiB)
io Link encap:Local Loopback
inet addr:12.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:6222 errors:0 dropped:0 overruns:0 frame:0
TX packets:6222 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:549314 (536.4 KiB) TX bytes:549314 (536.4 KiB)
mcc0 Link encap:Point-to-Point Protocol
inet addr:20.20.21.76 P-t-P:20.20.21.76 Mask:255.255.255.0
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:8065 errors:0 dropped:0 overruns:0 frame:0
TX packets:1097 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:10
RX bytes:2872924 (2.7 MiB) TX bytes:62525 (61.0 KiB)
And running sever as
./dhcpd -4 -d -cf /etc/dhcpd.conf -lf /var/db/dhcpd.leases eth0
DHCPDISCOVER from 00:10:5a:6e:94:01 via 20.20.20.75
DHCPOFFER on 20.20.20.80 to 00:10:5a:6e:94:01 via 20.20.20.75
DHCPDISCOVER from 00:10:5a:6e:94:01 via 20.20.20.75
DHCPOFFER on 20.20.20.80 to 00:10:5a:6e:94:01 via 20.20.20.75
DHCPDISCOVER from 00:10:5a:6e:94:01 via 20.20.20.75
DHCPOFFER on 20.20.20.80 to 00:10:5a:6e:94:01 via 20.20.20.75
DHCPDISCOVER from 00:10:5a:6e:94:01 via 20.20.20.75
In client side ,
Ipconfig /renew
C:\Documents and Settings\admin>ipconfig /renew
Windows IP Configuration
Unable to contact DHCP server.
C:\Documents and Settings\admin>
How to run relay without interfaces,
My requirement is running relay without interfaces for both ipv4 and ipv6.
If I run relay without interfaces,client not able to receive IP address.
Is ISC DHCP code has support for running relay without mentioning any interfaces for both IPv4 and IPv6.
If support is there means, what are all the options I supposed to give while running relay.
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