Networking :: Underwhelming The Routing/VLAN/bonding Performance?

Mar 10, 2011

Upgraded a school network from FastEthernet to GigabitEthernet. Broke the network up into VLANs. Discovered that the router (Cisco 2821) could only route between the VLANs at around 400Mb/s. Tested out some layer three switches. They work very nicely, but are more than we need. So I started putting some spare equipment we had together as a Linux router.

Result: Underwhelmed. The machine has two Intel GigE interfaces. With the machine configured to route between two test VLANs I get about 855Mb/s with a single interface (all VLANs trunked over the single interface). That's about what I'd expect. Maybe a little low. With the two interfaces bonded, I get about the same.

For testing, I set up eight Windows machines, four on each VLAN. The Linux router is the only machine that can route between the two VLANs. I used Iperf to generate traffic and measure throughput between pairs of machines. Two machines on the same VLAN get about 300Mb/s between themselves. With the four machines organized into cross-VLAN pairs, I get about 855Mb/s total throughput on a single interface and very slightly more with two interfaces bonded.

The Linux router has an Intel Xeon E5506 CPU running at 2.13GHz and these are Intel GigE interfaces (built-in). I would expect to get a large boost by adding the second interface. I've confirmed that bonding is working (by pulling either of the cables and watching everything continue to function).

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Networking :: Vlan Tagging With Bonding Not Reaching Gateway

Jan 28, 2011

I am running RHEL 5.3 on a blade server w/ 2 NICs that are bonded. I have 2 VLANs that I am trying to configure. I have created the network-scripts ifcfg-bond0.<vlan#>. I can ping the device but the gateway won't ping. I am in console mode so cutting and pasting output doesn't work.

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Networking :: Unable To Ping/ssh/connect Channel Bonding From Different VLAN?

Feb 26, 2011

I just setup a new LAMP server (CentOS 5.5 x86_64) box with channel bonding on NetXtreme II BCM5709 Gigabit Ethernet (IBM x3650 M3). The problem is I wasn't able to connect to this server when I'm in different VLAN's. This server also unable to ping different VLAN's. But everything works fine when I transact in the same VLAN.Here's the config:

Datacenter VLAN = 9
Firewall = Disabled
SELinux = Disabled

[code]...

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Networking :: VLAN Tagged And Untagged Routing?

Sep 13, 2010

I'm using my linux system (Linux 2.6.31.12-1.0.2) as a IPTV media center (XBMC). My interface configuration is

Code: eth0 Link encap:Ethernet HWaddr 00:01:2e:2b:12:6e
inet addr:192.168.1.6 Bcast:192.168.1.255 Mask:255.255.255.0
inet6 addr: fe80::201:2eff:fe2b:126e/64 Scope:Link

[code]...

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Networking :: Route Non-vlan Packet To A Vlan Interface

Apr 20, 2010

do you know if there is any possibility to route/force non-vlan packet to a vlan interface in Linux?

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Networking :: Insert Routing Data Into The Routing Table Doesn't Work?

Apr 6, 2010

I have a firewall, this consists of three NIC's:

Code: eth0[192.168.0.2] eth1[192.168.1.2] and eth2[10.10.165.2]

I am trying to ping eth0 from eth2, but I am not able to succesfully get a response from pinging the device, I am using:

Code: ping 192.168.0.2 -I eth2

I have tried to insert routing data into the routing table, but it still doesn't work

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Networking :: How To NIC Bonding

Mar 26, 2010

I am running FC10, How to NIC bonding ..

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Networking :: No Connection Within The Vlan?

Dec 13, 2010

i set up vlan1 in cat2950 switch

#config t
#int vlan 2
#ip address 192.168.1.7
#no shutdown

i then moved all the interface ports (port 1 - port 24) from the default vlan1 to the vlan2, with....

#int f0/1
#switchport mode access
#switchport access vlan2

the problem is that with the above configuration, i connected 3 linux boxes on the switch but non of them could connect with each other.
when i did a ping, it says "destination unreachable"

what am i missing out here, and whats the fix?

i assigned static ip address to these boxes, also there's no router in this network by the way. i dont think i will need one either as all the machines in in the same vlan2.

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Ubuntu Networking :: LAG Instead Of Nic Bonding?

Feb 16, 2010

I've run across a few threads in the archived forums regarding nic bonding. I could be wrong but I imagine most of the people that are looking at bonding are probably really wanting what they would get out of creating a LAG between their Ubuntu Server and a managed switch capable of LACP trunks. If you have two NICS on your ubuntu server and want 2gps throughput & failover check out the page on creating a LAG. Obviously this requires your switch to be compatible though. [URL]...

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Fedora Networking :: Creating VM VLAN ?

Aug 5, 2009

I'm preparing to "follow" these directions which will make VirtualBox's networking behave like VMWare's "NAT" networking. Of course, these instructions are for a Ubuntu/Debian setup.

I am quite certain that I can write a script that'll do the equivalent steps on my Fedora 11 box -- which is acceptable to me. I would, however, like to know how to splice this stuff into NetworkManager and/or /etc/sysconfig/networking/devices/, to do this the "right" way.

The desired networking behavior:
-VM's get assigned addresses via DHCP on a virtual network
-VM's can talk to each other and to their physical host
-VM traffic out to the 'real world' is NATted

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Networking :: Difference Between VLAN And Subnetting?

Apr 22, 2010

What are the function differences between VLAN and subnetting ?

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Networking :: How To Find What Vlan My Server Is On

May 10, 2011

Is there a way to see the vlan tagging associated with an ip addresses on my centos servers from their command line?

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Networking :: Regarding Transparent Squid Use In Different Different VLAN?

Apr 2, 2009

i have configured transparent squid with dansguardian for content filtering i used this squid server ip on client gateway(not on browser) for content filtering, is it possible that i could use this squid server in different VLAN.

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CentOS 5 Networking :: Setup Two NIC's And VLAN's?

Sep 12, 2011

I'm trying to setup a Asterisk box with two NIC's. The idea is that one NIC connects to the LAN on VLAN2 (for internal voice) and the other to the SIP trunk on my ISP's Cisco 1811, configured for VLAN3.

Some info: The Cisco's VLAN1 + 2 are available on my switch. VLAN1 = 10.105.44.x with gateway .254 (the Cisco). VLAN2 = 10.106.45.x with gateway .254 (the Cisco). The Cisco's VLAN3 is available on only a single port on de Cisco, connected to one of de NIC's of the Asterisk box, eth1, with IP 10.106.46.1 and gateway .254 (the Cisco). The other NIC, eth0, is connected to the switch, on a port setup for VLAN2.

So, what I'm trying to achieve: Use eth1 tagged with VLAN3 to connect to the SIP trunk. (I could do this with a static route because my provider has a fixed IP to connect to) Use eth0 for all other traffic.

Here are some config files I've setup so far (I'm stuck on connecting to the SIP provider):

network
NETWORKING=yes
NETWORKING_IPV6=no
HOSTNAME=localhost.localdomain
GATEWAY=10.106.45.254

[Code].....

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Fedora Networking :: Bonding With Static Ip

Feb 26, 2009

I installed Fedora 10 and used dynamic IP first. Then I found out that bonding works with static ip only so I switched to static IP. But then, since I have 3 NIC cards, I configured bonding. I need help in these points:

1- steps to follow so that I switch from dynamic to static IP
2- steps to follow so that I configure bonding

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Ubuntu Networking :: How To Make Bonding

Sep 1, 2011

I have 2 Net connection and 2 NIC. I want to know how to make bonding for that. I am using Ubuntu Server Natty 11.04 - 64bit

[code]....

Is it possible to make Bonding?

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Networking :: 802.3ad Bonding Not Using All Interfaces Equally

Apr 14, 2011

I am seeing an issue on a few servers where it doesn't appear all NICs in the 802.3ad lag are all operating at the same level. A few of the servers have two bonds each with two NICs in each bond.I have two NFS servers that each has 1 bond with 3 NICs.All are RHEL5 x64 2.6.18.I think the reason why I see one interface dominating RX and another dominating TX is due to the xmit_hash_policy but there are three hosts that use this particular server for network traffic.That's 3 different physical mac addresses.The layer2 algorithm should be fine in that situation I would think.Would I just be better off with balance-rr?

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Networking :: Bonding 2 Or More Adsl Connections

Nov 2, 2010

is possible to use linux (especially slackware) to bond 2 (ethernet modems) adsl connections. For example if i have 2 connection of 24mbs download and 512 upload i will create achieve 48 mgps dowload and 1 mgps upload . something like that

adsl1 modem <------ eth1--- (slackbox router) --- eth0---> my server
adsl2 modem <------ eth2----

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Networking :: NIC Bonding Works With Dhcp?

Dec 15, 2010

I want to bond two NIC to the same IP, I was able to do this for Static IP but not DHCP.
Does anyone have any idea about the possibility of this?

The process at which i reached to this question is explained here:
http://ubuntuforums.org/showthread.php?t=1645440

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CentOS 5 Networking :: Bonding Or Bridging?

Jul 19, 2011

I am confused as to what is going on with a particular box that I am working with.As you can see in the attached ifconfig print out, one eth port is basically only used as a output while the other is only really used as an input.I connect to the box via 10.20.40.104 for ssh,ftp,http,etc.I just want to know the name of what is happening (is it bonding,bridging?) and maybe some information about where it is configured.I looked in modprobe.conf

eth0 Link encap:Ethernet HWaddr 00:1E:C9:EE:5A:91
inet addr:10.20.40.105 Bcast:10.20.40.255 Mask:255.255.255.0
inet6 addr: fe80::21e:c9ff:feee:5a91/64 Scope:Link

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Fedora Networking :: VLAN Not Starting On Boot?

Jan 26, 2009

I just have installed FC 10 on a box that I will use as a router/firewall box. On the box I have three interfaces (eth0, eth0.704 (VLAN), and eth1). When the machine boots up, only eth0 and eth1 come up. If I run /etc/init.d/network restart, then eth0.704 will come up. If I add that command to rc.local, then all interfaces come up at boot.

I have the directive ONBOOT=yes in ifcfg-eth0.704. What would cause this vlan interface not to start at boot on the machine?

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Networking :: Failed To Remove VLAN Interface?

Feb 11, 2010

My Linux machine's all Ethernet ports are connected to Cisco 2960SCG switch. Linux machine is having two Ethernet cards. First one is using "e1000" Ethernet driver and the second one is with "nxge" Ethernet driver.

Problem is; I am successful while trying to delete VLAN interfaces over motherboard PCI Ethernet card, but if i try the same on other PCI card the following messages are coming,and soon system getting hanged.

Message from syslogd@ at Wed Feb 10 17:48:11 2010 ... localhost kernel: unregister_netdevice: waiting for eth5.390 to become free. Usage count = 4

Bofore using nxge based Ethernet card I used e1000 based only, for that also I had same problem.

[root@localhost ~]# ifconfig eth5.390
eth5.390 Link encap:Ethernet HWaddr 00:21:28:21:DB:D1
inet addr:192.168.155.4 Bcast:192.168.155.255 Mask:255.255.255.0
inet6 addr: fe80::221:28ff:fe21:dbd1/64 Scope:Link

[Code]....

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Networking :: Iterating Through Eth And Vlan Interfaces In Perl?

Jul 14, 2010

I'm searching for a small perl script to iterate through the configured eth and vlan interfaces to get their assigned ip address and perform some processing.I'm after something like:

@interfaces = (waytogetinterfaces);
foreach (@interfaces){
#perform processing
print "Interface IP is: ", $_->IP;
}

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CentOS 5 Networking :: VLAN And Gateway Outside Of Subnet?

Jan 12, 2011

My company hosts five Servers with CentOS 5 installed in a Data Center. The Data Center assigns a VLAN to each customer so that they can organize customers and also count traffic. The VLAN assigned to my company is in the form 62.103.X.X with a subnet mask 255.255.255.240 so the IPs that we can use in our Servers are 13. The first IP in the VLAN (for example 62.103.1.1) is the Gateway and the rest, that are calculated from the subnet mask, are assigned to servers(62.103.1.2 up to 62.103.1.14).

The problem I have is that we have run out of IPs in our VLAN. We have used all IPs and we want some more. The Data Center can assign new IPs but not grow our VLAN IPs by expanding the subnet mask. So they gave us a new VLAN with some IPs (for example 62.104.X.X with a subnet mask 255.255.255.192) They told me that I had to use as gateway the gateway of the first VLAN 62.103.1.1 and assign the new IPs as usual. So I assigned to one of the CentOS 5 servers the IP 62.104.1.2 and set the gateway to 62.103.1.1. Unfortunately this did not work and we could not establish connectivity to the Internet.Is it possible to assign a gateway outside of the IPs that are in the subnet? Could it be a problem with the VLAN setup by the Data Center?

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Ubuntu Networking :: NIC Bonding - Teaming And Switches ?

Jun 20, 2011

I have a question about bonded NICs and the switches they are connected to.

I have a server which needs to send a lot of data to another server quickly. Both have multiple GbE NICs. I understand what is required at the server end (I think) in that a pseudo-interface is created such as bond0 with the IP applied to that interface rather than eth0 and eth1.

My question relates to the connection between the servers, i.e. the switch. Is a specific type of switch required for this to work, as an IP will have 2 (or more) MAC addresses associated with it, or how does the switch decide to which port to route the traffic for the bond0 IP?

Also, will this only work when multiple connections are being made? What I mean is, will each individual TCP connection only use either the physical eth0 OR the physical eth1 interface, or can a single connection make use of the aggregated bandwidth, sending one packet to one physical interface and another to the other physical interface, using the bond0 IP as the destination?

What I am trying to work out is if I had a storage server connected to an application server and exporting storage using NFS or GlusterFS, would an aggregated link improve throughput?

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Networking :: Bonding / Binding Multiple Interface Into 1

May 27, 2010

I have 4 DSL modems connected with 4 different ISP's my scenario is

a) My FC-2 machine with LAN IP=192.168.10.1 and Bond0 IP=192.168.1.1
b) Modem-A LAN IP= 192.168.1.2 , ext IP=xxx.xxx.xxx.xxx
c) Modem-B LAN IP=192.168.1.3, ext IP=xxx.xxx.xxx.xxx
d) Modem-C LAN IP=192.168.1.4, ext IP=xxx.xxx.xxx.xxx
e) Modem-D LAN IP=192.168.1.5, ext IP=xxx.xxx.xxx.xxx

Modem-A, B, C, and D LAN connected with my FC-2 machine, and all 4 interfaces of my machine are in Bond0, Now please help me what default Gateway I should set in my FC-2 machine?>??? or I have to set 4 gateways in my machine?and will this configuration works?

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Networking :: Bonding Mode 1 Fails - Can't Ping The LAN

Oct 8, 2010

I'm trying to set-up a back-up (mode 1) bonding nic. I can't ping the LAN, pinging bond0 locally however works. Here is my config:

/etc/modprobe.conf
Code:
alias eth0 e1000e
alias eth1 e1000e
alias eth2 e1000e
alias eth3 e1000e
alias scsi_hostadapter ahci
alias scsi_hostadapter1 usb-storage
alias bond0 bonding
[Code].....

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Networking :: Network Bonding Citrix Xenserver

Apr 16, 2010

As Xen is based on LINUX I'm hoping that someone out there could help me. I'm struggling with 802.3ad on a cisco switch (LACP). I'm going to be using this for my storage network on a dedicated cisco switch talking to a teamed pair of intel NIC's ISCSI storage. From the intel side I can set them to Link aggregated one team 2GB this is fine and my config shows active active on the NICs. How would I go about doing this from a LINUX box. In order to remove any bottle necks it needs to be active active from Xen. If I do a pif-forget uuid= on a XEN server I'm in complete control using Linux.

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Fedora Networking :: VLAN Not Recognizing Incoming Traffic?

May 29, 2011

Before explaining the problem, I have to draw the environment. Because of post size limitations, I'll have to break this post in more than one entry.

Physical view

Code:
+--------+ +---+
|storage1|-----| |
+--------+ | s |
| w |
+--------+ | i | +-------+
|router2 |-----| t |-----|router1|--->Internet
+--------+ | c | +-------+
| h |
+--------+ | 8 |
|router3 |-----| |
+--------+ +---+
Device details

[Code]....

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Networking :: Getting A VLAN Router With A Wan Interface Capable Of Ethernet And AMT?

Oct 30, 2010

getting a VLAN router with a wan interface capable of Ethernet and AMT? something under $80-$100 pref.i need to segment a client on my home network.

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