Cisco Switches :: SG300 Switch 2 Separate Networks
Sep 1, 2011
We have 2 separate networks here, 1 for data (192.168.0.x) and 1 for VOIP phones (192.168.3.x).
I need them to both be connected to different ports on a switch (Cisco SG 300 10 port managed switch) which is then linked to another switch (Cisco Catalyst 2960 48 port switch). Then on this 2960 switch I want the link to be split back into the 2 separate networks. I think that I need to create 2 separate VLANs and assign them to different ports.
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Jan 19, 2013
We have a two separate businesses in the same building who will both need access to shared resources and the same internet connection. They will need to remain on separate subnets and cannot communicate directly to each other. The current switch is a Cisco ESW-520-48P and we are looking at purchasing an SG-300-20P for the new business moving in. Heres how we envisage setting it up:
ESW-520 will host Company A's network. Workstations, servers etcSG-300 will have two VLANS. VLAN1 will host all Company B's network. Workstations, servers etc. VLAN2 will host the shared resources such as printers. The internet gateway is a UNIX based system with 3 NICS. 2 NICS are taken up by ADSL connections while the other NIC is the LAN, which would connect to VLAN2 on the SG-300. We would like to define which ADSL connection to route through depending on which subnet traffic is originating. The ESW-520 will need access to the shared resources and internet gateway on VLAN2 on the SG-300.
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Jun 21, 2012
Created 2 separate VLANs on SGE2010P switch. Neither in Native VLAN 1.
For example;
-Port g01 in VLAN 56
-Port g25 in VLAN 56
-Port g10 in VLAN 10
-Port g37 in VLAN 10
All appears to work well within the respective VLAN (i.e. DHCP, ARP, etc. no IPs from other VLANs)STP - Spanning Tree is Globally disabled.
However; when I feed a n new network (which has STP enabled) into VLAN 10; I then plug a laptop with wireshark running into VLAN 56 - cannot see any other traffic/packet...except STP packets coming from a CISCO device on VLAN 10 while I am plugged into VLAN 56.
This demonstrates to me the network is not truely seperated. I know this because last night I crossed two networks and caused havoc; ouch.I configed a D-Link switch with the same scenario and no issue.
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May 9, 2011
I have a question, does the SG300-28 support VTP and STP?. I want to add it to my network's VTP domain so I don't have to manage vlans manually on the SG300-28 and also be able to configure STP to keep my network loop free.
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Sep 10, 2011
I am having an issue with LAG configuration on a Cisco SG300 52 switch. I have connected four Ge ports on the switch to the four NICs of a Dell R710 Server on which I installed Windows Server 2008 R2. Without LAG configured, these ports would forward traffic to and from the Dell server fine.However, if I configure LAG on the ports with LACP enabled, then they would not forward any network traffic. Debugging shows that the ports are up but their forwarding status show N/A. Am I missing any configuration? Can I configure LAG on edgeports?
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Oct 12, 2011
Mgmt Vlan 1 (default) Data VLan 10 (with access to internet) Is there a way to have a PC attached to a SG300 switch such that it can both access Vlan 10 for data and Vlan 1 for managment ? The PC's port clearly needs to be untagged PVID on vlan 10. I have tried adding vlan 1T and setting the port as a trunk port but to no avail, The switch is currently level 2. I am guessing this might not be possible in level 2 without setting the mgmt vlan to 10 ?.
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Feb 3, 2013
i have a SG300-52 Switch, route mode is enabled, and it is using the latest IOS.I have created 4 Vlans in this switch, till this point its OK, but once i try to give ip addres to the created Vlan either from the GUI or CLI the switch is not responding. i have to go and manually reset the switch using a pin.
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Mar 4, 2012
i was trying to set up a new SG300-52 L3 switch for switching and Vlan. The problem is that the vlans on this switch cannot get their DNS resolved. Probably a stupid thing i can't get to see, but i think it is a simple solution given switchin is not my expertise.So my setup:
- ISP Wan router: LAN ip 10.0.0.1, DMZ: 10.0.0.2 -> i have to use this router for ISP support. But it suckes, that's why we use own router for firewall, port forwarding etc.
- Nice Router: WAN: 10.0.0.2, LAN: 192.168.1.1
- SG300 L3 switch
This works. I can ping switch, nice router, ISP router and google's ip from VLAN 5.But i cannot ping google using host name. From within SG300 i can. So it has something to do with SG300 not doing DNS right.My Client on VLAN 5 has ip 10.1.1.5 / 24, default gateway and dns pointing to switch: 10.1.1.1.I have put an entry in DNS servers in SG300: 192.168.1.1 active (pointing to Nice router). On client leave default gateway pointing to switch. But put DNS server : 192.168.1.1
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Oct 10, 2011
I have a recently purchased 28 port SG300 switch. Everything is working well. Unfortunately there is so much traffic flying around that a 10MB half duplex device is struggling to function as it is overloaded. Removing some of the sources of traffic fixes it.
Fortunately I only need to access that device from one PC on the network. That PC however needs to access everything else on the network.
Is there a simple way to shield the slow device from everything except traffic from the PC ?
The switch is in Level2 mode at the moment. Everything is on a single sub net.
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Feb 8, 2013
What does "ip routing" do on the CLI on the SG300? When I do this, I see it enables ip forwarding, but there is no mention of this in the CLI manual. I'm just trying to figure out what I would use this for, and if I should leave it enabled, or disable it. I have several different SG300 switches in L3 mode, and they are set up in a multi-vlan environment...
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Jan 18, 2013
My problem is that the switch all of the sudden doesn't boot up anymore. The System LED constantly flashes, after probably 40-50 seconds or so it constantly lights for a second, afterwards all the lights on the ethernet ports light up for a second and the process starts all over again! The console messages:
Device configuration:Slot 1 - SG300-10PDevice 0: GT_98DX3033B (AlleyCat2)
-------------------------------------- Unit Standalone --------------------------------------
Tapi Version: v1.9.5Core Version: v1.9.519-Jul-2012 17:55:03 %INIT-I-InitCompleted:
[Code].....
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Oct 22, 2011
I've seen lots of posts from people having problems routing traffic between two vlans with some complicated examples. Any simple step-by-step example for an SG300 switch (in layer 3 mode) to configure two vlans and sending traffic between the two vlans without an external router?
-VLAN1 10.10.10.0
-VLAN2 10.10.20.0
I've tried to do this through the GUI and can't seem to make it work. I'm missing something in the GUI.
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Sep 11, 2012
I discovered on a pair of SG300-28P.
On a second switch (ver 1.2.7.76) when I unplugged the power cord, to my amazement the switch turned right back on (about 1 second later), with the power cord removed. To verify that the power is indeed coming from POE, the upstream switch (ver 1.1.2.0) that is the same model (sg-300-28p), shows all 7 Ethernet ports connecting the two drawing from 2700mW, to 3000mW.
While the second switch is powered from the first over POE, the POE does not work on the second switch to power anything, and the system summary mentions something about "PoE Power Information on Master Unit".
Is this a stacking operation, and is POE on the second switch NOT supposed to work when powered over Ethernet from an upstream switch?
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Apr 28, 2013
I have inherited a custome with a bunch of SG300's in their LAN room and one out in the warehouse.I need to setup a VLAN and the genius before me did not label which LAN room switch the warehouse unit plugs into. Is there a tool/method I can use to find which switch, and port this warehouse switch is connected to?
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Dec 5, 2012
I am having some issues with getting DHCP Relay to fuction properly over our SG300-20 Switch.Out current layout is as follows. Hanging off the SG300-20 are a pair of Clustered Checkpoint Gateways with VLAN'ed interfaces in Both of our 2 VLANs, a 3COM 4200G In VLAN1 which has the DHCP server (And all the other Servers) connected to it, and a Pair of HP Procurve 2520's Stacked in VLAN 2 to provide PoE for our Phones/connectivity for our PCs.The problem is I cannot get the DHCP Relay to fuction from VLAN 1 to VLAN 2. If I assign an address in VLAN 2 manually to a device connected to the Procurves, everything works fine. I am able to reach both VLAN 1 and VLAN 2, but DHCP aquisition fails even if the device is connected directly to a port assigned to VLAN 2 on the SG300. The SG300 is running at Layer 3 currently also.
Here is a copy of the running config:
--------------------------------------------------------------------------------------------------------------
switch4db24f#show running-config
vlan database
vlan 2
exit
interface range gi8,gi16
switchport default-vlan tagged
[code]....
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Aug 30, 2011
Our customer use catalyst switch that spanning tree be PVST+ mode.I take SG300 connect with this catalyst switch.Does it support ?If it support,how to config on SG 300 ?
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Mar 9, 2012
I have two switch SG300-10 that need to be interconnect togheter with a simple redundant "cable fail safe" configuration.My idea is use the two uplink copper port of the first switch, connected to the two uplink copper port of the second switch.
How to create a working setup configuration? The first setup that i need, is with only one VLAN1 for all ports,
The second setup is with the VLAN1 assigned to the ports 1-2-3-4 of all the two switch, (linked togheter by uplink ports)
and the VLAN2 assigned to the ports 5-6-7-8 always linked togheter with the same uplink ports.
Is possible use the two uplink port at the same time, as cable fail safe? or use a uplink port 1 for the first group and the second uplink port for second group?
I need to use this configuration for audio cobranet transport, and i need to test the correct configuration for the primary and secondary audio stream, if can work togheter on the same VLAN or i need to separate the two stream, from start to the end.
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Apr 1, 2012
I have my network with severals SG300 switches.I have one of them like my core switch working in layer 3 mode. With 2 vlans and vlan interfaces to each vlan.Everything is working ok.But now i have to connect one 3com unmanage switch that have host from vlan 1 and 2. How should i connect this switch to my Cisco sg300 switch?
[code]...
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May 1, 2011
I have 2 PCs at home. Lets name one of them as PC 1 which has two onboard LAN Ports. Now, PC1 has to connect to PC 2, just a home network for easy transfer on files and stuff, and it also has to connect to the internet via a network. The problem is both of them use static ip and when I tried configuring PC 1, it allows only one of the connections to remain active. I simply get an error otherwise saying "Multiple Gateways" will cause conflict and I will be stuck with only one connection. After much study I "somehow" connected both. I vaguely remember using the "route" command in cmd to achieve this. But now, I am getting an error when I try to access PC 2. My Internet is working fine.I am not network savvy at all. run both these connections from PC 1. I should add that I can in no way modify/change/or do anything else to my internet network since it is out of my control. I can do anything, however, for my Home Lan with PC 2. I run windows 7. Both the connections are wired, by the way.
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May 21, 2012
i am first time to trying to make Vlans. I managed to do 2 vlans to SA520 to ports 1 and 2. But when i try to separatethem to SG300 with web management it doesnt work. Vlan 1 works fine, i untagged wanted ports and forbid vlan 2 ports.In Vlan 2 there vice versa, is this right way to do? Both Vlans has their own DHCP range as i do them to SA520.
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Aug 29, 2011
These are our first switches and seems like GUI is lot different than the online. Out intervlan routing is o not working. I am absolutely sure that I setup the switch in L3 mode since it allows me to create mutiple interfaces. I am hoping that this GUI issue is related to interVLAN routing.
Below is the blog I started for InterVlan issue [URL]
This is the link for online simulator and what I see in its IP tab. I know this switch is not SG300. [URL]
This is what I see on our switch.
Our switch version
switchd64684#show version
SW version 1.1.0.73 ( date 19-Jun-2011 time 18:10:49 )
Boot version 1.0.0.4 ( date 08-Apr-2010 time 16:37:57 )
HW version V01
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May 26, 2011
1) I have a Cisco SG300-28P. I plan to add a SG300-52. Would it be possible to manage the new switch through the SG300-28P web browser ?
2) There are 2 fans in the POE model SG300-28P. How many fans are they in the non POE switch SG300-52 ?
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Feb 5, 2012
I would like to set up two separate networks from one internet connection(modem), with the goal being to have a public network(Network A) that would have a small server on it, and then having a second secured network(Network B) that would have my personal computers on it. And both networks having connection to the internet. (The idea being that if the server somehow became compromised that my personal computers and their data would be safe)I have done some research and found that many people claim this can be done with just two or three routers, but none of them go into any detail about how to configure the routers. Below are the physical setups of the two options that I have come up with in my research, which if either would you recommend? And how would I configure each of the routers?
--------------
Modem/router 1 (Network A public)
--Internet-in WAN port
--port 1 to WAN of router 2-------------l
--port 2 server
[code]...
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Sep 12, 2012
I have two subnets at my home and both run through my Cisco router. One is my private LAN with access to the Internet, ie your standard home network. The other is a semi-public network that I share with friends through an encrypted GRE tunnel system(DMVPN) over the Internet. I have a server on that semi-public network and I can access my friend's servers from my server, but not from my main PC on my private network.
Is there a way I can access both networks from only my main pc using two nic's?
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Mar 29, 2012
how I can setup two separate networks on a Westell 327w modem/router. I know this question has been asked to death and I've utilized the search function, but I still don't know how to make this work. I have a computer that I plan on using for important business and my sibiling has my other computer that he uses for gaming and downloading stuff. His computer is connected wirelessly to the Westell 327w. My computer has no internet access at this point. I would like to have both connected wirelessly to the internet, but keep them completely separate and as secure as possible, as he downloads some questionable things.
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May 7, 2012
1. I currently have a Comcast Business Class Gateway, Cisco 2100 Series WLAN Controller and a Cisco ASA 5505 all connected together to supply LAN and WLAN internet connections on my network.
2. I also have a Card Access Security System on it owns network. It currently does not have internet access.
I would like to put my security system on the internet so that I can support it remotely. To do this, it has to be on a firewalled internet connection.Can I put the two networks on my ASA 5505 and keep them seperate? I don't want to provide a path into the Security System through my current LAN & WLAN. But I do need a frewalled internet connection on my Security System. I am trying to avoid purchasing a seperate firewall.
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Apr 26, 2011
I have two separate network with their own internet access as shown below I want to keep all setting of the left network unchanged. I can change the IPs and setting of the right side network.I want to be able to access all devices of the two network from my computer but in the same time the two network work as usual with no problems ( the same when they are sperate).One option is to set the LAN of modem 2 to 192.168.2.2 and connect one of the LAN port to LAN port of the Mkrotik router. Set the WAN of my private home router as
IP: 192.168.2.100
subnet mask: 255.255.255.0
gateway: 192.168.2.2
Home router LAN: 192.168.3.1
Is their another method to connect the two network and keep the same setting for the network on the left side?
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Feb 9, 2012
I am trying to make 2 COMPLETELY seperate networks with only 1 internet connection. We have routers, switches and all that. But we need to know how to set it all up. there are 2 companies in the same office, each company needs their own network at which they can view eachothers files but in no way view the other networks files.
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Oct 3, 2012
I'm new at this stuff and very stumped. I have one WAP with multiple SSIDs that support VLAN ID (for a private and guest wireless network) and a managed switch that supports tag or port based VLAN ID. How do I set up the switch so that the networks are separate, but can still reach their own routers to get on the Internet? In case details are necessary, the WAP is a Cisco Aironet 1130AG and the switch is a Netgear FS750T2
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Feb 5, 2012
We are a small office currently running a regular network (9 wired, 2 wireless) and also using the "guest" feature (7 wireless) on a Linksys E2000. We have a switch to connect our wired equipment to the E2000. If "A" is our regular network, and "B" is our guest network, is it possible to have 2 routers on 1 cable modem and still prevent network "A" from seeing Network "B" and vice versa?? We are looking to do this because we will soon be exceeding the maximum guest users (10) allowed by the E2000. We have another Linksys router in storage, I think it is a WRT54G, that we would use if this is possible.
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Mar 3, 2013
I want to connect 2 routers like this picture.No need to have it as separate networks.
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Feb 8, 2012
Can I connect a single Cat5e cable between two SG300-28 and link them? If so what must I configure?
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Jul 25, 2012
I have SG300-28P that I am using as layer-3 switch. Recently I ran in to SG300-52 switch and even though loading same firmware doesn't give me option to do layer-3 switching. For SG-300 I see options in GUI to create vlan interfaces under IP information section, while SG300-52 has IP information option only under the management section.let me know if these are 2 different hardware types and L3 is not possible on SG300-52. If its possible to enable L3 switching on SG300-52?
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