search for: showmacs

hi: my box use eth0 connect my pc. but I type command "./brctl showmacs br0", no mac addr display and the" brctl showmacs program" not exit,always exec # ./brctl show bridge name bridge id STP enabled interfaces br0 8000.000123456789 no eth0 hdlc...

Hi list When I create a domU the network isn''t reachable when it''s loaded. Only if I do a xm console domUname and do some sort of network activity like pinging an outside host or traceroute. First then there''s network connection from the outside to services like webserver etc. What can cause this? I''m using Xen 2.0.5 stable domU from binary dist and

...I'm doing wrong? To add some mistery, sometimes (one try out of 10) the reply flows correctly to the remote client. All the three interfaces (eth0, br0, tap0) doesn't have firewalling enabled, and under /proc ip_forwarding is enabled and rp_filter is disabled for all interfaces. brctl showmacs br0 correctly shows the remote virtual interface MAC address as not local.Both eth0 and tap0 have been configured with ifconfig 0.0.0.0 promisc up. Thanks in advance. Alessandro Fiorino

...nd clients are able to talk to each other. When the WET11 is plugged in is when things start acting up. Every client (including those behind the WET11) are able to connect out to the internet, but clients cannot talk to each other. If Client A(port 1) tries to connect to Client B(port 2), `brctl showmacs br100` shows that Client B moved to port 4(port 4 is where the WET11 is plugged in. If I change the WET11 port, the port Client B moves to is also changed), and the router can no longer ping Client B. [root@deadbeef root]# brctl showmacs br100 port no mac addr is local? agein...

...I often get duplicate replies when the bridge is running and connected (and only then). This is not normal behaviour, is it? Is this a known problem? I tried to nail down the problem. On the eth0 side there is a host 192.168.0.1 and a host 192.168.0.39 (00:A0:24:CF:E8:8E). On the bridge with brctl showmacs br0 I can see where 00:A0:24:CF:E8:8E is supposed to be. It should be on port no. 1. Nevertheless, brctl showmacs br0 sometimes shows the 00:a0:24:cf:e8:8e on port no. 2, i.e. eth1. This is when the duplicates/reflections occur. At one instance: tsushima:/etc# brctl showmacs br0 port no mac add...

...P broadcas= t. I _could_ use raw sockets. The problem is when I do that, the program is us= ing ~8% cpu on a 3.2ghz xeon64 just reading packets without doing anything = due to the amount of traffic passing through the box (~200mbit and increasi= ng) so that doesn't look like a good idea. brctl showmacs returns a list of port numbers, but they dont make much sens= e to me. They do not seem to be in the same order I added the interfaces? I= s there a mapping here? Example, jorgen@ams41:/$ /tmp/brctl showmacs test0 port no mac addr is local? ageing timer 2 00:04:e2:a8:3b:...

...gh PC1 and PC2 are in the same IP subnet (addresses 192.168.222.1 and 192.168.222.2), a ping doesn't pass the bridge. By starting "ping pc2" on PC1 and "ping pc1" on PC2, I ensure that both machines are transmitting data frequently, and thus should show up in "brctl showmacs", but brctl showmacs lnxbr0 says: port no mac addr is local? ageing timer 1 00:0c:29:6d:f0:55 yes 0.00 2 00:0c:29:6d:f0:5f yes 0.00 2 00:0c:29:97:e3:a6 no 0.14 So there is one NIC missing - that one of PC1. Does anyone have an explanation? I don't know what could be w...

.../> <video> <model type='cirrus' vram='9216' heads='1'/> </video> </devices> </domain> Starting VM, corrisponding on two interfaces declared, vnet1 e vnet2 are showed in ifconfig (vnet0 is for another VM) but "brctl showmacs br0" don't show their MACs What I wrong? Thanks for your attention, sorry if I missing to post some useful data, please tell me, what you need. -- A presto -Valerio-

Raffaele If you don't want to see much arp traffic on eth1, assuming that you have a subnet 10.190.190.0/24, with 10.190.190.1 on eth1 and the rest of the hosts on eth0, you can use for example, the following filter ebtables -N f1 ebtables -P f1 DROP ebtables -t filter -A FORWARD -i eth0 -o eth1 -p ARP -j f1 ebtables -t filter -A f1 -p ARP --arp-ip-src 10.190.190.0/24 --arp-ip-dst

...to recover it is to restart the affected domU. We have no special iptables or ebtables configurations in place. I can''t find any reference to similar problems on the list or elsewhere. Below is the output of ''xm info'', ''brctl show'', and ''brctl showmacs xenbr0''. Any help would be appreciated. host : xen1-central release : 2.6.18-6-xen-686 version : #1 SMP Fri Dec 12 20:13:49 UTC 2008 machine : i686 nr_cpus : 2 nr_nodes : 1 sockets_per_node :...

...# AppDatabaseDS guest brctl addbr xen-brINT brctl stp xen-brINT off ifconfig xen-brINT up # # # add a bridge between the Firewall guest and the # DMZwebserver guest brctl addbr xen-brDMZ brctl stp xen-brDMZ off ifconfig xen-brDMZ up # # # show what exists to verify xm list echo " " brctl showmacs xen-br0 echo " " brctl showmacs xen-brDMZ echo " " brctl showmacs xen-brINT echo " " # # start the 3 guests xm create /etc/xen/xm1firewall xm create /etc/xen/xm2webserver xm create /etc/xen/xm3idsappdb # # /etc/xen/scripts run the network script 4 times to # associa...

Folks, = I tried to create a forward table on GW2348 (avila) board. Dummy network = interface is created to simulate sending traffics to kernel from virtual re= mote port with mac addresses every 5 seconds. It works perfectly in fedora = 5 that means "brctl showmacs br0" returns remote mac address on table all t= he time. = But in GW2348 board, remote mac entry only shows before forwarding timer = expired. After that no more remote entries show up after "brctl showmacs br= 0". = Anyone knows why? = = ---henry -------------- ne...

Hi, all, I wish to copy over fdb(forwarding database entries) learnt over from one interface onto as they are from another interface. Like for eg : brctl showmacs br0 port no mac addr is local? ageing timer 1 00:30:1a:01:6f:e4 no 0.46 1 00:30:1a:1c:3d:b7 yes 0.00 2 00:30:1a:1c:3d:b8 yes 0.00 Instead of the above in line 1 if i wish to forcefully add mac &...

I've got a 2.6.8 kernel with bridging enabled as a module, two nics (LNE100TX and RTL8139) and i've run the following commands with no errors modprobe -v bridge brctl addbr br0 brctl addif br0 eth0 brctl addif br0 eth1 both interfaces have 0.0.0.0 as their addresses and brctl showmacs br0 shows the macs for both internal cards. However, bridging doesn't seem to be working at all. What am I missing or what else can I try to debug what might be wrong? thanks

Hi all, I just intalled openvpn + bridge in CentOS 6, but i get strange problems: the remote PCs cannot get the local PCs' MACs and also, the local PCs cannot get the remote PCs' MACs but when i run "brctl showmacs br0" it will list all the MACs and also " brctl show" will show that all the correct adapters are in br0 SELinux disabled any ideas? -- Tang Jianwei System Administrator

Hi, If you are running brctl tool on the linux box then there is a command that will automatically determine the number of MAC addresses in the network #brctl showmacs <bridge name> <port number of ur lan interfce> grep -v -w port | wc -l Ex: #brctl showmacs abcd 1 grep -v -w port | wc -l Note that, for this to work your box should be confogurred as a bridge in promiscuous mode.... I use this method to automatically determine the number of MAC addr...

Hi, If you are running brctl tool on the linux box then there is a command that will automatically determine the number of MAC addresses in the network #brctl showmacs <bridge name> <port number of ur lan interfce> grep -v -w port | wc -l Ex: #brctl showmacs abcd 1 grep -v -w port | wc -l Note that, for this to work your box should be confogurred as a bridge in promiscuous mode.... I use this method to automatically determine the number of MAC addr...

I'm debugging a strange problem of noncommunication between two devices. The test configuration is also strange, and involves loops. Things magically start working when I run tcpdump to put the bridge interface into promiscuous mode. I also noticed this in the output of brctl showmacs. port no mac addr is local? ageing timer 1 00:40:72:04:2d:ea no 27.10 1 00:40:72:04:2d:ea yes 0.00 Disregarding for the moment the loops in the test setup, which are probably the root of the problem, it seem...

...bridges in series. They are running Linux 2.6.15 with bridging enabled in the kernel configuration. When I first power up both boards the bridge comes up fine and the two outside LANs are connected as if it were one LAN with a smart long cable in between. brctl works to set it up and the "showmacs" properly shows all of the MACs on each end. The problem occurs If I disconnect the ethernet cable directly from the bridge at either end. The console on the disconnected units says "br0: port 2(eth0) entering disabled state". When I reconnect the cable it shows "br0: port 2...

...1 512 1 r-----4.1 root@jaguar-0:/home/longina# brctl show bridge name bridge id STP enabled interfaces eth1 8000.0060085f963e no peth1 vif1.0 root@jaguar-0:/home/longina# brctl showmacs eth1 port no mac addr is local? ageing timer 1 00:0a:b8:00:be:0a no 0.84 1 00:10:db:ff:26:d0 no 0.00 2 00:16:3e:00:00:04 no 38.40 1 00:60:08:5f:96:3e yes 0.00 2...