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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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.

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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.

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

network
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[Code].....

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[code]...

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Feb 11, 2010

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[Code]....

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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).

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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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Jul 3, 2010

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I must missed something

My ifcfg-eth0 goes as follow

Code:

My ifcfg-eth0.2 goes as follow

Code:

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Plugged this NIC into the HATTERAS hardware (with a straight cable), and thought that this way I should be able to ping the public gateway or any ip out on the internet. My ISP is telling me that I should create a VLAN trunk to be able to 'use the internet', but as I understand in linux if I create any number of VLANs on one NIC they are already trunked. I also got the info, that the traffic is tagged, and I can separate the traffic reading the tags. I already read that some NICs are not able to VLAN because they are not able to handle the increased packet size.

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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.

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I have the following system

# cat /etc/redhat-release
CentOS release 5.5 (Final)
# uname -r
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I'm currently setting up a vlan network and after reading several man pages I still have 2 questions / problems:

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vlan1 10.1.1.0/24
vlan2 10.1.2.0/24
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[code]....

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[code]...

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[code]....

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Jul 22, 2011

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