search for: vlan

Displaying 20 results from an estimated 1879 matches for "vlan".

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2015 Jan 26
2
VLAN issue
Thank you everyone. OK, the mystery deepens, I guess. The machine does need to support several VLAN's, it is currently on a trunkport (8021q encapsulated), it made it into the ARP table - which I specifically tested for by physically unplugging the table, clearing the ARP table and plugging it back in. The ARP table currently looks like this: hq#show arp Protocol Address Age (min)...
2014 May 30
3
Centos box and Cisco 3750 VLAN's
Hello all, I have a CentOS box that has a NIC (eth0) on which I defined 4 VLAN's (counting the NIC itself): eth0, eth0.1, eth0.2 and eht0.3. Initially the Cisco switch was not partitioned into VLAN's which means that the only VLAN running on it was the default one (VLAN 1). I have then played with VLAN's a bit on the switch and at this point have two: VLAN 1 (whi...
2015 Jan 26
3
VLAN issue
OK, thanks again for all your help. I have resolved this, finally. The problem was that I configured VLAN 48 as the native VLAN on the trunk port.That was a mistake as apparently the native VLAN is the one where Cisco does not bother to tag packets. For now I set the native VLAN to VLAN 1 and that works. Cheers, Boris. On Sun, Jan 25, 2015 at 7:13 PM, Boris Epstein <borepstein at gmail.com>...
2007 Apr 18
5
[Bridge] RFC: [PATCH] bridge vlan integration
...ached patches enables the bridge to filter and forward packets according to their IEEE 802.1q headers. The goals behind this change include : - Enable running STP on 802.1q tagged networks. STP packets must be untagged. It isn't obvious how else to enable STP with the current bridge and vlan code. - Add native support for an untagged vlan. Currently an untagged vlan can be implimented using ebtables or similar. - On devices bridging a large number of interfaces across various vlans this significantly simplifies configuration and, depending on configuration, can improve performan...
2015 Jan 26
0
VLAN issue
...e the detailed port configs on the switch end: hq>show interface Gi1/0/3 switchport Name: Gi1/0/3 Switchport: Enabled Administrative Mode: trunk Operational Mode: trunk Administrative Trunking Encapsulation: dot1q Operational Trunking Encapsulation: dot1q Negotiation of Trunking: On Access Mode VLAN: 48 (VLAN0048) Trunking Native Mode VLAN: 48 (VLAN0048) Administrative Native VLAN tagging: enabled Voice VLAN: none Administrative private-vlan host-association: none Administrative private-vlan mapping: none Administrative private-vlan trunk native VLAN: none Administrative private-vlan trunk Nat...
2005 Oct 28
2
VLAN tagging problems
We are using Centos behind an F5 Bigip load balancer. The linux box is using bonding and tagged VLAN's Everything works fine except that when traffic is forwarded from the BigIP to the linux box on the VLAN where the web server is running the linux box returns the traffic on the wrong VLAN, It returns traffic on the lowest ordered VLAN. ie. here is a tcpdump on my load balancer showing tr...
2009 Feb 04
2
More complex Xen Networking, with VLANs and maybe with VDE 2... but how?!
...pervisor also in bridge mode. Some networks are exclusive to certain customers, others are shared among different customers. However, in our switches, all the networks are all the doors. So I can move a domu through the Xen Hypervisors that the network will work. So far so good but, as we have no VLANs, there are many conflicts of IP, as well as any customer can interfere with the whole network putting, for example, the IP of the border gateway in your virtual machine ... this setup is also possible that customers sniffer neighboring networks, which is a major security breach and I want to chang...
2009 Feb 12
11
UV fastpath after Crossbow
...on''t work if UV fastpath is enabled. Since the link usage data are collected based on the statistics of the mac_client_impl_t, and UV fastpath skips the GLDv3 processing, that won''t be available. I don''t see a solution for this except to document this restriction. 2. VLAN kstats won''t work. If we enable UV fastpath over VLANs, packets would go directly between the lower VLAN stream and the IP stream over softmac, the VNIC (vlan) kstats won''t be updated. This could be work around by changing vnic_m_stat() function, to add up the legacy VLAN kst...
2015 Jan 25
2
VLAN issue
On 25 January 2015 at 15:12, Boris Epstein <borepstein at gmail.com> wrote: > OK... but why does it need to be a trunk port? > Because a trunk port will "trunk" the vlan. A VLAN is basically a 4 byte "tag" that gets injected into the packet header when the packet enters the VLAN network. When we trunk a VLAN we say to the switch "pass packets on VLAN x but do not strip the tag out". You can either terminate the VLAN at the switch port (untagge...
2007 Jul 04
8
VLAN configuration
Hi to the ML. I''m new to VLAN configuration, and combining it to XEN is a bit difficult. I want to use VLAN because it''s possible to "arping" from a domU to an other, and VLAN looks like; the only solution to prevent that. May be I''m wrong if someone got a solution, I may be interrested. I''...
2013 Jan 09
16
[Bridge] [PATCH net-next V5 00/14] Add basic VLAN support to bridges
This series of patches provides an ability to add VLANs to the bridge ports. This is similar to what can be found in most switches. The bridge port may have any number of VLANs added to it including vlan 0 priority tagged traffic. When vlans are added to the port, only traffic tagged with particular vlan will forwarded over this port. Additionally,...
2015 Jan 24
3
VLAN issue
...ennis are spot on. Their conclusions about your server being connected to an access port and not a trunk port would be my conclusion as well. On Sat, Jan 24, 2015 at 9:11 AM, Dennis Jacobfeuerborn < dennisml at conversis.de> wrote: > Hi Boris, > what I'd like to know is the actual VLAN configuration of the switch > port (link-type and tagged and untagged VLANs). When I look at the > switchport coniguration here I get (among other things): > > ... > Port link-type: trunk > Tagged VLAN ID : 8, 1624 > Untagged VLAN ID : 10 > ... > > Here is my su...
2015 Jan 24
3
VLAN issue
Do you need the whole configuration? On the switch end, we have the relevant VLAN (VLAN 48) with the assigned IP address of 192.168.48.101 and the range of ports (Gi1/0/1 - Gi1/0/8) assigned to that VLAN. Seems - and acts - like a legitimate setup and works fine, except for this particular instance. Thanks. Boris. On Fri, Jan 23, 2015 at 8:54 PM, Dennis Jacobfeuerborn < d...
2018 Jul 11
1
Adding a VLAN tag to a libvirt SR-IOV VF network using the "virsh net-update" command
Hi all, How do you add a VLAN tag to a libvirt SR-IOV VF network usingthe "virsh net-update" command? I couldn't find the section to passto the "virsh net-update" command to add the VLAN tag. I have the following libvirt network defined for a SR-IOV VF: <network>  <name>GE0-0-SRIOV-1</name...
2007 Apr 18
1
[Bridge] Transparently bridge Vlans to eth0
Hi, I'm using Vlans in my network as a way of preventing pier to pier communication - I only want nodes in the network to talk to the gateway (a linux box). I have successfully set up lots of sub interfaces using the vconfig too, one for each vlan. What I would like to be able to do is remove the ip address from eac...
2007 May 24
5
bonding + VLANs -> Oops/panic, no VLAN on 100 Mbit cards [SOLVED]
As the issue concerns both the -user (configuration) and -devel (OOPS), I''m sending this message to both lists. Some time ago I complained about two problems: - VLANs are not working on machines with 100 Mbit cards - I get a kernel Oops (sometimes panic) when I try to use bonding and VLANs with Xen The root of the issue is the same in both cases: VLAN interfaces must *not* be brought up before we start our Xen network scripts. So have four cases with Xen:...
2007 May 24
5
bonding + VLANs -> Oops/panic, no VLAN on 100 Mbit cards [SOLVED]
As the issue concerns both the -user (configuration) and -devel (OOPS), I''m sending this message to both lists. Some time ago I complained about two problems: - VLANs are not working on machines with 100 Mbit cards - I get a kernel Oops (sometimes panic) when I try to use bonding and VLANs with Xen The root of the issue is the same in both cases: VLAN interfaces must *not* be brought up before we start our Xen network scripts. So have four cases with Xen:...
2008 Jul 25
2
2 DHCP servers - different VLAN's
Hello guys, to describe my scenario i have 4 VLANS on my switch, each VLAN is different subject. I have one DHCP server for 3 VLANS + second one DHCP server for 1 VLAN - named VLAN 7 . Problem is , this started to make problems suddenly. VLAN 7 is not recieving IP adress from correct DHCP server . On DHCP server where declaration for subnet is co...
2010 Aug 03
6
xen vlans in domU
Hello. I''m trying to use vlan in domU, but have something strange: I created bridge on eth0. This interface was configured as trunk with vlan 300, 301. I use this bridge in my domU, and I can see tagged packets when run tcpdump in domU. Also I created interface on domU to work with vlan 300. On this interface I see untagged...
2010 Jul 01
2
Kickstart from tagged VLAN?
I've searched around but haven't found a definitive answer yet, is it possible to kickstart from a tagged VLAN? I found this bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=431915 But I can't find out how far the vlan support goes. I haven't found anything about it in any kickstart docs. I have two tagged vlans: Vlan 100 - server subnet Vlan 101 - backup subnet From start to finish anaco...