[Click] Single NIC Router config sample

[Beyers Cronje]

I've just started playing around with Click config and thought you might want to add the following "Single NIC Router config" to the samples page. This can be ideal to play around with Click when you only have one NIC installed in the router.

The sample config runs two subnets 10.51.1.0/24 and 192.168.0.0/24 on the single interface. I havent tested this config extensively but it seems to work just fine. Default route points to 192.168.0.1. I'm new to Click so should anyone feel there is a better config for this scenario feel free to enlighten me.

Regards

Beyers Cronje


//*****************************************
// Generated by make-ip-conf.pl
// eth0 10.51.1.1 00:0D:61:CB:C9:EA
// eth0 192.168.0.2 00:0D:61:CB:C9:EA

// Shared IP input path and routing table
ip :: Strip(14)
    -> CheckIPHeader(INTERFACES 10.51.1.1/255.255.255.0 192.168.0.2/255.255.255.0)
    -> rt :: StaticIPLookup(
	10.51.1.1/32 0,
	10.51.1.255/32 0,
	10.51.1.0/32 0,
	192.168.0.2/32 0,
	192.168.0.255/32 0,
	192.168.0.0/32 0,
	10.51.1.0/255.255.255.0 1,
	192.168.0.0/255.255.255.0 2,
	255.255.255.255/32 0.0.0.0 0,
	0.0.0.0/32 0,
	0.0.0.0/0.0.0.0 192.168.0.1 1);

// ARP responses are copied to each ARPQuerier and the host.
arpt :: Tee(3);

// Input and output paths for eth0
c0 :: Classifier(12/0806 20/0001,12/0806 20/0002 38/0A330101 ,12/0806 20/0002 38/C0A80002,12/0800, -);
FromDevice(eth0) -> c0;
out0 :: Queue(200) -> todevice0 :: ToDevice(eth0);
c0[0] -> ar0 :: ARPResponder(10.51.1.1 00:0D:61:CB:C9:EA, 192.168.0.2 00:0D:61:CB:C9:EA) -> out0;
arpq0 :: ARPQuerier(10.51.1.1, 00:0D:61:CB:C9:EA) -> out0;
arpq1 :: ARPQuerier(192.168.0.2, 00:0D:61:CB:C9:EA) -> out0;
c0[1] -> arpt;
arpt[0] -> [1]arpq0;
c0[2] -> arpt;
arpt[1] -> [1]arpq1;

c0[3] -> Paint(1) -> ip;
c0[4] -> Print("eth0 non-IP") -> Discard;


// Local delivery
toh :: ToHost;
arpt[2] -> toh;
rt[0] -> EtherEncap(0x0800, 1:1:1:1:1:1, 2:2:2:2:2:2) -> toh;

// Forwarding path for eth0
rt[1] -> DropBroadcasts
    -> cp0 :: PaintTee(1)
    -> gio0 :: IPGWOptions(10.51.1.1)
    -> FixIPSrc(10.51.1.1)
    -> dt0 :: DecIPTTL
    -> fr0 :: IPFragmenter(1500)
    -> [0]arpq0;
dt0[1] -> ICMPError(10.51.1.1, timeexceeded) -> rt;
fr0[1] -> ICMPError(10.51.1.1, unreachable, needfrag) -> rt;
gio0[1] -> ICMPError(10.51.1.1, parameterproblem) -> rt;
cp0[1] -> ICMPError(10.51.1.1, redirect, host) -> rt;

// Forwarding path for eth0
rt[2] -> DropBroadcasts
    -> cp1 :: PaintTee(2)
    -> gio1 :: IPGWOptions(192.168.0.2)
    -> FixIPSrc(192.168.0.2)
    -> dt1 :: DecIPTTL
    -> fr1 :: IPFragmenter(1500)
    -> [0]arpq1;
dt1[1] -> ICMPError(192.168.0.2, timeexceeded) -> rt;
fr1[1] -> ICMPError(192.168.0.2, unreachable, needfrag) -> rt;
gio1[1] -> ICMPError(192.168.0.2, parameterproblem) -> rt;
cp1[1] -> ICMPError(192.168.0.2, redirect, host) -> rt;
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