Helo !
I set up a new server using FreeBSD 6.0-RELEASE. Everything is ok, until I try to connect it to the internet. After I set up the connection I try to ping yahoo.com and I don't get any reply. When I try to ping the gateway I get a lot of replyes for the same packet. It looks similar to this:
Does anyone have any ideea about where the problem can be ?
Thanks.
Duplicated Incoming Packets
It is not uncommon to observe a short burst of duplicated traffic when the bonding device is first used, or after it has been idle for some period of time. This is most easily observed by issuing a "ping" to some other host on the network, and noticing that the output from ping flags duplicates (typically one per slave).
For example, on a bond in active-backup mode with five slaves all connected to one switch, the output may appear as follows:
# ping -n 10.0.4.2
PING 10.0.4.2 (10.0.4.2) from 10.0.3.10 : 56(84) bytes of data.
64 bytes from 10.0.4.2: icmp_seq=1 ttl=64 time=13.7 ms
64 bytes from 10.0.4.2: icmp_seq=1 ttl=64 time=13.8 ms (DUP!)
64 bytes from 10.0.4.2: icmp_seq=1 ttl=64 time=13.8 ms (DUP!)
64 bytes from 10.0.4.2: icmp_seq=1 ttl=64 time=13.8 ms (DUP!)
64 bytes from 10.0.4.2: icmp_seq=1 ttl=64 time=13.8 ms (DUP!)
64 bytes from 10.0.4.2: icmp_seq=2 ttl=64 time=0.216 ms
64 bytes from 10.0.4.2: icmp_seq=3 ttl=64 time=0.267 ms
64 bytes from 10.0.4.2: icmp_seq=4 ttl=64 time=0.222 ms
This is not due to an error in the bonding driver, rather, it is a side effect of how many switches update their MAC forwarding tables. Initially, the switch does not associate the MAC address in the packet with a particular switch port, and so it may send the traffic to all ports until its MAC forwarding table is updated. Since the interfaces attached to the bond may occupy multiple ports on a single switch, when the switch (temporarily) floods the traffic to all ports, the bond device receives multiple copies of the same packet (one per slave device).
The duplicated packet behavior is switch dependent, some switches exhibit this, and some do not. On switches that display this behavior, it can be induced by clearing the MAC forwarding table (on most Cisco switches, the privileged command "clear mac address-table dynamic" will accomplish this).
Helo !
I set up a new server using FreeBSD 6.0-RELEASE. Everything is ok, until I try to connect it to the internet. After I set up the connection I try to ping yahoo.com and I don't get any reply. When I try to ping the gateway I get a lot of replyes for the same packet. It looks similar to this:
Does anyone have any ideea about where the problem can be ?
Thanks.
Did you set up the server to see the DNS server(s)?
In solaris it's /etc/resolv.conf, but I don't know what it is in FreeBSD.
Hi
I did the following script to ping multiple servers, but I keep on receiveing duplicate emails for one server that is down:
#!/bin/bash
date
cat /var/tmp/servers.list | while read output
do
ping -c 1 "$output" > /dev/null
if ; then
echo "node $output is up"
else
... (10 Replies)
help with bash script!
im am working on this script to make sure my server will stay online, so i made this script..
HOSTS="192.168.138.155"
COUNT=4
pingtest(){
for myhost in "$@"
do
ping -c "$COUNT" "$myhost" &&return 1
done
return 0
}
if pingtest $HOSTS
#100% failed... (4 Replies)
Hi Team,
Need shell script to Telnet multiple node , Ping some IP and print output like pass or fail.
Need this script to check reachability of multiple nodes at same time.
Help me.
I use this but not working...
Eg.
in this script i need to telnet... (4 Replies)
Hi,
I have ip addresses from 192.168.0.1 to 192.168.0.10.
I have to ping those series of IP address in single command? Which command i can use? (2 Replies)
I have written perl ping program to ping list of IPs one by one and print the status.But each and every time it is showing the status as Pass for all IPs even though the IP is wrong.
multipleip.pl
use Net::Ping;
$p = Net::Ping->new();
$ifile="inventory.txt";
... (2 Replies)
Hi,
I develop simple animation ping script on Solaris Platform. It is like Cisco ping.
Examples and source code are below.
bash-3.00$ gokcell 152.155.180.8 30
Sending 30 Ping Packets to 152.155.180.8
!!!!!!!!!!!!!.!!!!!!!!!!!!!!!.
% 93.33 success... % 6.66 packet loss...... (1 Reply)
Can someone tell me if I tweak the destination field in an arp request for TCP connection to match it with the the mac addresses of different recivers in an ethernet as the packet passes through them in short each one catches the arp request and replies, what would happen I mean will the sender of... (2 Replies)