Inter-VLANs Router With In/out Policers, Ipv6
Oct 11, 2009
Can you make a recommendation for a switch-based L3 router which can
- hold a moderate number of routes (interface routes, a few hundred statics + default)
- OSPF and BGP
- MST
- 1024 layer-3 dot1q subinterfaces (or maybe VLAN interfaces)
with
+ traffic policing in and out per subinterface/vlan
+ VRRP/HSRP/NSRP
- IPv4 & IPv6 native
- 2x GigE ports
- Not tip-over under 1gbps DDoS towards a VLAN interface.
I've been using 3560Gs, but they seem to lack the output traffic policing. I'd prefer to have subinterfaces which don't run spanning-tree, versus Vlan Interfaces to a trunk interface which runs spanning-tree. These switches sit at the L3 boundary between two L2 networks.
Cost is a big factor; but I also must carry vendor licenses & support contract, if the vendor asserts that not doing so is illegal in US.
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Dec 19, 2007
I just came across this listing for Corning Optical Fiber LEAF(R) on eBay [url]. I've never used optic fiber cables before and want to experiment with them for indoor and inter-floor(friend below) use. The listing says that the coating is CPC6, which is some kind of acrylic coating over the fiber.
My question is: Can the above cable be used without further sleeving or some other protection/covering over it? I read somewhere that the cable must be reinforced and covered with PVC jacket or something,
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Nov 5, 2008
how to add different IPs in different VLANs
My customer requests different IPs in different class C, that are belong to different VLANs in the switch. Let's say
- they have 1.1.1.10 already on their server with gateway value is 1.1.1.1
- now they want to have 1.1.2.10 too.
I have no trouble to provide them a new IP, but wonder how to setup on server now? Different range will use different gateways.
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Apr 16, 2009
Is there a VPS provider that will sell me a VM , and put it up somewhere, and can make me another VM in the future, on the same VLAN as the original VM ?
For example, pretend VM #1 has a NIC at 10.0.0.100
in the future, I want another VM with a nic at 10.0.0.101
I was looking at Go-Grid , but I'm not sure how their pricing works.
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Sep 5, 2006
I need a basic L3 switch for maybe 25 mbps that will do hopefully up to 50 VLANs and which will not require me to hire someone to configure it.
As much as I like Cisco, that rules them out.
The reason I'd like a Layer 3 switch is so that I can run my backups and inter-server transfers without adding to my bandwidth bill. Also, VLANS are a critical requirement as i have a lot of customers with root on their managed servers.
So i am looking at HP [gasp] switches. How "easy" is the web-based configuration widget? [I'm an advanced unix admin but networking is a mystery to me.]
This is a starter switch and once i have a full cab of servers I'll be able to spend $7K on a pair of 3560s and hire someone to configure them for me ... but until then what can i get to meet my requirements?
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Sep 22, 2009
My switch 3COM 4500 (Layer3) ;
I want port 1 of switch work in all VLANS!
I created vlan2, vlan3 and add this trunk/hybrid port in all vlans and ping no work por port1.
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Jul 13, 2009
I orded today new switch 3COM (48 port + 2giga + 2 fiber).
In WebPanel i created:
vlan2: port1 - port 20
vlan3: port21 - port40
I want configure switch for port 41-48 access all ports;
What solution for this cenary?
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Feb 11, 2007
I'm trying to implement VLANs on my network and can't get connectivity to host servers. Here's how the network is configured. Pardon the bad ascii diagram.
In this example my upstream is providing two subnets:
111.111.111.16/28 (I'm using an IP from this subnet to manage the 3550)
222.222.222.16/29
I am attempting subdivide the /29 into two /30's in order to place a server into it's own /30 subnet & VLAN ............
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Jul 24, 2007
What's the benefits of these private VLANs I've seen advertised around? Anyone have a good understanding?
I've read a few things about them but have yet to fully grasp the concept.
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Dec 4, 2006
I'm not sure exactly how to phrase the question. But, I'm researching how to PXE boot a server without having a DHCP/PXE server in each vlan.
Scenario: Datacenter with dozens of servers. 1 VLAN per server. Cisco switches and routers. Each server has a serial console available for remote management (OS and BIOS are configured for serial console). If an admin wants to re-install OS, they should be able to reboot the server and tell the BIOS to initiate a PXE boot request. A central install server is available to provide the DHCP and PXE boot images.
Has anyone tried this? I have been reading about the 'ip helper-address' for Cisco to relay DHCP requests. Interested in hearing about real-world setups. Or is there a better way to accomplish remote OS installs?
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Aug 10, 2008
I have two servers both in a same vlan. Both may access Internet and be acceessed from Internet I setup db server and web server internal IP each as follows:
step 1: on web server:
vi /etc/sysconfig/network-scripts/ifcfg-eth0:0
add following:
DEVICE=eth0:0
BOOTPROTO=static
BROADCAST=192.168.1.255
IPADDR=192.168.1.5
NETMASK=255.255.255.248
NETWORK=192.168.1.0/24
ONBOOT=yes
TYPE=Ethernet
save and /etc/init.d/network restart
step 2: on db server:
vi /etc/sysconfig/network-scripts/ifcfg-eth0:0
add following:
DEVICE=eth0:0
BOOTPROTO=static
BROADCAST=192.168.1.255
IPADDR=192.168.1.10
NETMASK=255.255.255.248
NETWORK=192.168.1.0/24
ONBOOT=yes
TYPE=Ethernet
save and /etc/init.d/network restart
I used ifconfig to check both status, both of them are up. both of them may ping google, but when I try to ping their each other through internal IP, nothing returns.
I used command tracert to follow, found all packages were sent to Internet rather than an internal IP.
My host tells me to do it by making NAT, I have no idea on it. Anyone may help me out on how to do with NAT?
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Aug 8, 2008
we are looking for a provider that provides public ip vlans' with dedicated server purchases,
so far,,
we have found few companies that offer this at no extra charge or minimal extra charge
1) softlayer (best choice)
2) singlehop
3) nocster/burst.net (not a good provider for business hosting / not reliable / no phone support)
does anyone know of any other dedicated server providers that offer public ip vlans for no extra charge or minimal extra charge?
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Jun 9, 2007
I'm looking for a solution that I can place a firewall between 2 vlans on
a BigIron router with L3 enabled.
For this moment there is one big vlan2 with a ip-route 0.0.0.0 0.0.0.0
123.123.123.123 and a router-interface ve2 with the IP of the router, the
address I use as gateway on the machines behind it.
The WAN port has the IP address to communicate with to the GW of the
carrier-router (123.123.123.122)
Because I want to let the BigIron the routing I was thinking of 2 vlans,
one for the lan-vlan and one for the wan-vlan, but this will be a problem
because I only have one IP-block what I can use.
So the sitiuation must be as follow on the BigIron:
WAN => vlan2 => firewall => vlan3(lan)
Because of the fact that the firewall will be transparent, this should be
no problem to place it between the vlans. The actual problem is how to
manage this. In simple words, I should be able to replace the firewall
with a cross-cable and it should still work.
Cisco for an example has a SVI solution for this, but I can't find such
thing for a Foundry router.
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Feb 13, 2007
Having a slight problem working with one of our Extreme Summit 48 (ugh) switches - I've figured out most of the basics, but I can't seem to find any way to add a secondary IP address to a VLAN! This, I would have thought, would be a pretty basic feature to have. Typing "config vlan [vlanname] ipaddress 1.2.3.4/24" works for setting the primary IP, but I can't figure out how to add any more - and doing the command again just overwrites the first one.
So... does anyone have any tricks up their sleeve, or is this something that Extreme neglected to add to this model switch?
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May 22, 2008
We offer colocation & dedicated servers as well as shared & reseller hosting services.
Our colocation customers and dedicated server customers are definitely on their own VLANs for obvious reasons.
Up until now, we have been using separate VLANS and ip allocations for each of the servers in our shared & reseller server fleet. I'm starting to question this policy for many reasons:
1) We directly manage all of the servers and it is very rare that any servers are compromised to the point where they can steal an IP address.
2) We are wasting IP addresses - network, broadcast and gateway addresses are required for each vlan. Additionally, if a server needs 1 more IP address, we need to add a whole new block.
If all of the servers are under our direct management, does it make sense for us to use any vlans at all? It seems that it only serves to complicate things, waste ips and add management overhead.
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Sep 19, 2009
I've read that all ethernet switches in a MST Region need the same Name, Revision number, and list of member vlans for each Instance. So what happens when you need to change the range of VLANs in a MSTI ? Let's say that you need to add a range of vlans to an instance that spans 20 switches? How would you do that?
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Aug 6, 2008
I've read that Virtuozzo 4.0 supported ipv6. I'm having problems finding anything to help setup the node for ipv6. I can't anything on the web except for some people talking about how to disable ipv6. So I was just wondering if anyone else has seen anything.
Edit: I don't think I posted in the correct section. Opps. Could a moderator move this to the right section?
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Jul 28, 2009
we would like to extend our services with providing IPv6 for dedicated servers.
Our colo will provide us /48.
Am pretty new to IPv6. Can anobydy give some hints about IPv6 addressing for such scenario.
How should we cut that /48? How much IPs shoud I provide to every server?
Any real hosting world scenarios?
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Apr 13, 2008
If you took every dns A record that exists for an ipv4, converted it to an AAAA ipv6 address record, what would the disk space difference be amongst every computer that hosts a dns server today?
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Sep 12, 2007
to buy some more Layer 3 switches but I'd like to get ipv6 support. I like the Cisco 3550 but it does not support ipv6.
Can someone recommend a switch in the same price range (less than $1400 for 48 ports) that supports ipv6? This will be used for connecting to customer servers.
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Jun 20, 2008
I did a little research about availability of dedicated servers with native IPv6 and my results are... Well, let's just say that they are worse than I expected them to be.
Only providers that I found (with IPv6 carriers in brackets) are:
- OVH, FR (Teleglobe, Global Crossing),
- CoreIX, UK (Tiscali, Teleglobe),
- Goscomb, UK (NTT/Verio, Global Crossing),
- FDCServers, US (NTT/Verio, Hurricane Electric).
There is also LeaseWeb (and I found one IPv6 server running on their network), but I didn't find any information regarding IPv6 on their page.
If you know others, please update the list (with IPv6 transit providers if you know them, no peering/IX please).
As you can see, there are at least 5 carriers who provide native IPv6. What bothers me is the fact that most of the US providers use NTT/Verio, Global Crossing or both of them in their BGP mix. Why don't they enable IPv6 connectivity? All their hardware supports it as IPv6 isn't anything new, so I really don't see a reason why they don't do it... Anyone want to enlight me?
As this isn't 'offers request' thread, I guess it wouldn't be against the rules for providers to say 'we do IPv6'
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Apr 15, 2008
Using CentOS server hosted with The Planet.
When I do an ifconfig I see a regular IP as well as an IPv6 one.
Does this mean my server is accessible via IPv6 as well, and would that bypass any firewall I have set on the regular IP? I noticed theres a ip6tables as well but I don't have it started. I'm fairly new to iptables in general so I'm not touching ipv6 now, unless I have to. Would it be safe to just block everything through ipv6 or would that be bad?
I'm kind of interested in learning more about IPv6 and eventually actually supporting it, but for now I rather not until I learn more about it.
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Jul 26, 2008
In terms of dedicated servers how does this work? Is this something you can ask for, and is there any advantage to having it? Is it also possible to have an IPv4 AND IPv6 on same server?
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Apr 28, 2008
if there are any shared hosting providers offering ipv6-based hosting right now?
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May 25, 2007
I want to start a private ircd that is only accessible to ipv6 clients, but I can't find a provider who can provide me with this. I've contacted FDC Servers about this, but they can't provide me with an ipv6 address on a vps.
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May 2, 2007
for a linux VPS package provider that can provide both IPv4 and IPv6 (not tunneled) connectivity. IRC client/bots are not a priority but would be a bonus.
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Aug 5, 2014
Nginx is listening on port 7080 with ipv6 protocol only.ipv6 isn't use on the server (ipv4 only).If I disable ipv6 support on the server, is this stopping nginx to use ipv6 ? (and some other process)How can I disable IPv6 on Plesk 12 ?
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