Hi Thanks for all the replies. I am afraid that the issue is not portfast. It was set before I did the test and and I set it again this morning just to be sure. I am at a bit of a lost as to what to try next. The bonding driver in RHEL5 is more than a year old so it might be a bug...
Regards > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:rhelv5-list- > [EMAIL PROTECTED] On Behalf Of Doug Weimer > Sent: 01 April 2008 18:01 > To: Red Hat Enterprise Linux 5 (Tikanga) discussion mailing-list > Subject: Re: [rhelv5-list] bonding problems > > On Tue, 01 Apr 2008, Gerrard Geldenhuis wrote: > > > eth0 is plugged into a Cisco 2950 called A > > eth2 is plugged into a separate Cisco 2950 called B > <snip> > > Watching /proc/net/bonding/bond0 this shows that it immediately makes > > eth0 active again. > > > > However immediately upon doing that the ping starts to fail for about 30 > > seconds and then after 30 seconds starts working again. > > This sounds like a spanning tree issue. To test this you can turn on > portfast > on the switch by running 'spanning-tree portfast' on the interfaces > that the HP is connected to. My rudimentary understanding of spanning tree > is that it is an inter-switch protocol that provides path negotiation and > protects against things like network loops. The default setting is to > prevent packets from being transmitted over the port while the spanning > tree negotiation takes place. Setting portfast tells the switch to > transmit packets while the negotiation is happening. Be sure to talk to a > network admin before using something like this on a wide scale. > > One of the general problems with using the Link Detection method of > bonding is that it assumes that the interface is active as long as there > is a link. Things like spanning tree can make this assumption invalid. If > you don't mind the additional traffic on your network, you might want to > look into the arp_interval and arp_ip_target bonding module options. > > Thanks, > > Doug _______________________________________________ rhelv5-list mailing list [email protected] https://www.redhat.com/mailman/listinfo/rhelv5-list
