search for: stp

On 09/16/2015 10:15 AM, Dmitry E. Mikhailov wrote: > On 09/16/2015 03:02 PM, C.L. Martinez wrote: >> What advantages and disadvantages have?? If I will want to install >> some kvm guests that use multicast address for certain services, is it >> recommended to enable STP? > STP has nothing to do with multicast as it's an Ethernet protocol. > It's developed to provide loop-free redundancy links to Ethernet-based > networks. > > I can't imagine any legitimate use of STP within virtualized environment > except when BOTH a) you don't t...

I have noticed a change in the linux bridge implementation between 2.1.15 and 2.1.17. Specifically, I do not think BPDU's (generated from another bridge) are passed across the bridge when STP is disabled. I think this relates to the LLC handling of BPDU's directly invoking br_bpdu_rcv. In 2.6.15, the br_handle_frame function would pass a BPDU to the br_handle_frame_finish function which would transmit it across the bridge. But in 2.6.17, the br_bpdu_rcv function is invoked di...

Hi all, We are facing a problem with STP implementation. We have only 2 switches. Thats the constraint, but we feel STP should work. Background: We have developed a layer 2 switch. This uses Cirrus logic's ep9301 processor, embedded Linux 2.4.21 kernel as the OS and zarlink's switch controller. The observation: 1)we have 2 swi...

...; stephen is the maintainer of the linux spanning tree bridging code, an > implementation of 802.1D-1998 that has very wide spread use. > > tony is the chair of the IEEE802.1 working group. > > i am trying to get my patch submitted in the linux kernel to fix a bug > in the way STP behaves. stephen and i discovered that the flaw is > actually in the IEEE802.1D-1998 spec, and that the linux implementation > was merely following this. i contacted tony to try to see if we can get > an update to the 802.1D-1998 spec, as this is what is implemented in the > linux...

Hi all, Reading docs about using bridges in a KVM environment, I have a doubt about activating STP or not in a KVM host. What advantages and disadvantages have?? If I will want to install some kvm guests that use multicast address for certain services, is it recommended to enable STP? Thanks.

...ridged, and the official libvirt wiki does exactly in this way here [1]. NAT networking is already configured by libvirt creating a bridge called libvirt0, while bridged networking have to be configured manually by the user. The libvirt0 bridge for NAT networking is default configured in this way: STP=on MAXWAIT=0 While suggested br0 bridge for bridged networking is configured in this way: STP=off MAXWAIT=5 Please, can you explain me why STP is on for NAT and should be off for bridged networking? It seems much easier to me to create loops when using bridged networking than NAT. Moreover, readi...

...* Then i tryied posixifying the group (as i did with the builtin group "Domain Users" *s4bind upgradegroup Leerkrachten 30000* This however gives me ERR: (insufficient access rights) "LDAP error 50 LDAP_INSUFFICIENT_ACCESS_RIGHTS - <00002098: Object cn=Leerkrachten,cn=Users,DC=stp4,DC=stp,DC=internal has no write property access > <>" on DN cn=Leerkrachten,cn=Users,DC=stp4,DC=stp,DC=internal at block before line 7 Modify failed after processing 0 records It seems that there is no write access to "self" (i seem to remember something from my old openld...

It appears that interfaces participate in STP's forwarding delay even when STP is disabled for a given bridge. I can remedy by setting the FD to 0 for each new bridge, but I'm wondering if this is by design or oversight. [root@ ~]# brctl show bridge name bridge id STP enabled interfaces br0.690 8000.000...

Hello! "brctl stp br0" would crash brctl provided that br0 is a bridge. This is caused by incorrect number of arguments in the commands table. "stp" needs at least 2 arguments after "stp". The patch against version 1.0.4 is attached. -- Regards, Pavel Roskin -------------- next part -...

When we create an L2 loop on a bridge in netns, we will see packets storm even if STP is enabled. # unshare -n # ip link add br0 type bridge # ip link add veth0 type veth peer name veth1 # ip link set veth0 master br0 up # ip link set veth1 master br0 up # ip link set br0 type bridge stp_state 1 # ip link set br0 up # sleep 30 # ip -s link show br0 2: br0: <B...

On 12/07/2023 17:48, Ido Schimmel wrote: > On Tue, Jul 11, 2023 at 04:54:15PM -0700, Kuniyuki Iwashima wrote: >> When we create an L2 loop on a bridge in netns, we will see packets storm >> even if STP is enabled. >> >> # unshare -n >> # ip link add br0 type bridge >> # ip link add veth0 type veth peer name veth1 >> # ip link set veth0 master br0 up >> # ip link set veth1 master br0 up >> # ip link set br0 type bridge stp_state 1 >> #...

...se smbd:search ask sharemode = false syncops:onmeta = no workgroup = THECRICK winbind enum groups = yes winbind enum users = yes [production_rw] comment = Production writable path = /general/production read only = no [stp-test] comment = STP Test Export path = /general/export/stp/stp-test read-only = no ***[END smb.conf]*** The [production_rw] export is a test directory on the /general filesystem which works from an SMB client. The [stp-test] export is an AFM fileset on the /general filesy...

Recently ran into a problem with the 2.6.18 kernel on Xscale arch when a br= idge, with multiple interfaces on it, is configured with a redundant loop. = All interfaces are left on forwarding and nexer switch to block when the lo= op is introduced. This was tested against a 2.6.16 kernel and the problem d= id not occur, interfaces forwared and blocked correctly. Any help would be = appreciated.

Hi, Checking the llvm test-suite SingleSource/Regression/C++/EH/class_hierarchy testcase on aarch64 I noted something strange: Dump of assembler code for function _Z4funcj: 0x0000000000400650 <+0>: stp x22, x21, [sp,#-48]! 0x0000000000400654 <+4>: stp x20, x19, [sp,#16] 0x0000000000400658 <+8>: stp x29, x30, [sp,#32] 0x000000000040065c <+12>: add x29, sp, #0x20 => 0x0000000000400660 <+16>: .inst 0x2bfffff7 ; undefined Where it s...

...6/2015 10:15 AM, Dmitry E. Mikhailov wrote: >> On 09/16/2015 03:02 PM, C.L. Martinez wrote: >>> What advantages and disadvantages have?? If I will want to install >>> some kvm guests that use multicast address for certain services, is it >>> recommended to enable STP? >> STP has nothing to do with multicast as it's an Ethernet protocol. >> It's developed to provide loop-free redundancy links to Ethernet-based >> networks. >> >> I can't imagine any legitimate use of STP within virtualized environment >> except when...

hi list! i'm trying to find a convenient way to build a redundant filtering bridge under linux i looked at carp project, but carp doesn't support bridge now i thing the most appropriate way is using stp or rstp it seems that 2.6 kernel supports stp but what about rstp? I read some docs about stp, but they are rather outdated (2001 and kernel 2.2) there are several problems indeed: * rstp support * fw state sync * fw rules sync did some of you resolve these problems? any help appreciated, i...

...the ping (and other network traffic) does not work reliably. After tracing the code, it looks like a software bug. Since bridge software is been running by thousands of people. I guess I am wrong. Anyway, here is the problem. There are 2 boxes and each one has 2 interfaces, 1 ethernet and 1 wifi. STP is enabled for the bridge to avoid the loop. So the box 1 has wifi in the blocking mode. When we ping from box 1 to box 2, lots of packages lost. Ping from box 2 to box 1 does not has this problem. After we tracing the code, we noticed that the box try to using wifi to send the packages which is...

Hi, Could somebody explain, why bridge uses minimal MAC of the attached devices? It makes this address instable, variable during bridge life-cycle, which is not good for DHCP. For example, I want to attach multiple virtual devices to one physical. Then, I need to make sure that after each virtual device addition, bridge addr is not changed and still addr of the physical device. Why not to

...ion might catch this and replace the ldr in %bb.1 with a mov instruction. As we move such spill down to its successor, we can also encourage more shrink-wrapping as well. .globl _mytest // %bb.0: // %entry sub sp, sp, #224 // =224 stp x28, x27, [sp, #128] // 8-byte Folded Spill stp x26, x25, [sp, #144] // 8-byte Folded Spill stp x24, x23, [sp, #160] // 8-byte Folded Spill stp x22, x21, [sp, #176] // 8-byte Folded Spill stp x20, x19, [sp, #192] // 8-byte Folde...

...nel: br0: received packet on enp0s3 with own >> address as source address >> nov 12 15:30:22 localhost kernel: br0: received packet on enp0s3 with own >> address as source address >> > > sounds like a loop. > > What says 'brctl show'? > When I enable stp: [root at localhost ~]# brctl show br0 bridge name bridge id STP enabled interfaces br0 8000.080027a398e6 yes enp0s3 enp0s8 > > best regards > Ulf > _________________________...