Cisco Switching/Routing :: SG300 - Vlan Setup Automatically Changing?
Jul 9, 2012
I have 2 SG300 switches, in layer3 mode, lag'd together for high availability, serving 2 Dell R815's and a Dell Equallogic 4100 for virtualisation. I have setup a number of vlan's, network traffic, mgmnt traffic, iScsi, vMotion etc and they seem to work.
However, Equallogic unit suddenly became unavailable to view for managment yet maintained iscsi traffic for the servers ok. After much head scratching, noticed that one of my SG300's had the vlan ports assigned to various vlans had *automagically* changed there assignment, ie tagged changed to excluded, but only for one of the iscsi traffic connections and the mgmnt port, both coming from the Equallogic, the other iscsi continued its assignment fine. The other SG300 hasn't changed. Guaranteee no one has been into change it and no changes have been made to Dell servers or Equallogic.
Q. Is there any circumstance where the switch can change the port setup itself? or is there any external circumstance that would trigger that change either?
This has now occured twice. The setup is running as a test lab, not in production until all setup is complete, then it will replace our existing harware.
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Apr 18, 2012
I have a 3560 switch with the following ports config [code] I would like to use theses ports on a different vlan to connect 4 pc's to them. Can I just remove them from the vlan, remove the trunk switchport and set up on the vlan i want them on with no trunking?
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Dec 22, 2012
I am having trouble after creating a management vlan (99) on a 3550 switch.I have configured the vlan (99) and given it an IP (192.168.1.100) and a default gateway (my router address - 192.168.1.99).I can ping to the switch from a PC and vice versa. The management VLAN IP is fine but now I cannot ping to the router from either the PC or the switch.It seems that just by adding VLAN 99 with it's own IP address has now prevented pings from the switch/ PC to the router ?Due to the fact that I have created a new switch management VLAN with an IP, does this mean I have set up the router as a 'router on a stick' scenario ? [code]
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Feb 5, 2012
I recently set up a small photography business and am trying to get a Cisco 877 and Cisco SG300-10 switch to talk to each other.
What I want is for the Cisco 877 to handle the internet and the SG300-10 to handle the local network,
I have set up 2 vlans in trunk mode on the switch and want vlan2 to manage local traffic and vlan3 to handle the internet.
I have got the 877 connecting to the internet what I dont have, traffic going to vlan2 on the switch from the 877
Look at the running configs for the switch and the router and tell me how to get the vlan on the router to pass traffic to the switch. In a nutshell I am inserting the internet into the switch but am not sure how to progress. I have the c870-advipservicesk9 image file on the router.
Switch Config
interface gi2
description connection-to-data-vlan
exit
interface gi3
description connection-to-internet-vlan
exit
vlan database (code )
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Sep 23, 2012
I just got my Cisco SG300 28, but I have some problems getting the routing to work. I get the vlans to get to the router, with the default route. But not getting them to talk with each other. I can ping the IPs from the cisco, but I am not getting traffic to go from vlan 1 to vlan 2. When I try to google, it say that it should do it automatically, and I found no setting for it. It looks like it not creating any route for the interfaces.
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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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Nov 21, 2011
when I was using image 1.0.0.27, I was able to move the management VLAN from 1 to which ever VLAN I wanted. For some reason, after switching the image to 1.1.1.8, I no longer have that function.
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Mar 18, 2013
I have spent several days tearing my hair out trying to properly configure our small business switch (SG300-10p) for voice. The phones are a relatively new addition and will replace old POTS phones.Our network consists of a 1941 ISR router, the SG300-10P switch, a mac server (handing DHCP, DNS, AFP), 4 client desktops and 4 SGA525G2 IP phones. The router, server, desktops and phones all have their own connection to the switch and the second data ports on the back of the IP phones are not used. We do not have any unified comms devices for voice. Our VOIP solution is hosted by a local SIP provider, and each phone independently registers with the provider's SIP proxy over the internet.
Left almost to it’s own devices (or presumably flat, default settings on VLAN 1), this whole setup works just great. We can TFTP files, make and receive calls, and do all the usual XML stuff. Calls are crystal clear. Even the localisation and directory works. However, I’ve been told several times that to ensure good quality on VOIP calls during periods of busy traffic, I should set up some form of QoS. A Voice VLAN on the switch, I was told, is the best way to do this as it automagically gives priority to the whole voice VLAN over the normal data VLAN.
I have followed instructions in numerous manuals, articles and guides, and have managed to create the Voice VLAN, both manually and automatically (I can watch Smartport detect the phones and see the Auto Voice VLAN add the ports to the VLAN as I connect them). The trouble is, as soon as this happens, the phones lose connectivity with the rest of the network, including the DNS server and the router, and therefore the internet, causing them to lose registration with the SIP service.
I tried adding the server and router ports to the Voice VLAN and tweaking every possible combination of tagged, untagged, excluded, trunk, access, general and PVID settings I can think of (by the way, I have no idea what any of those mean). The switch is in Layer 2 mode, but adding the port connected to the router to all the VLANs does not result in internet connectivity to the phones. I have told the phones to tag frames with the VLAN ID and told them not to. I have tried upgrading firmware and I have rebooted the switch so many times I'm tired of those wretched little flashing lights.
Nothing seems to work. And so I am stuck with everything on VLAN 1. My most recent thought is that the 1941 needs to know about the Voice VLAN (I checked CDP and it knows about the switch), but I’m reluctant to start messing with the router config when this is our production network, at least without knowing what I'm doing. I don’t even know if QoS applies when a Voice VLAN is not set up and we're on VLAN 1, some articles say yes, others say no. And when it is set up right, how does that priority transfer to the router? I’ve looked in the router manual and config options and found something called 802.1Q, but I have no idea what it is, how it works or even if it applies to our situation. Can I forgo VLANs altogether and use QoS some other way, perhaps?I have googled enough to cobble together our setup in IOS up until now. Ideally, I would still like to be able to ssh or https into each device (as I do now) for management, and I’ve read about setting up a another VLAN for config, monitoring etc, but I guess that would mean routing between VLANs in Layer 3.
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Oct 6, 2012
To setup SG300-20 as CORE switch and SF100-48 as Distribution switch.SG300-20 will have 2 VLAN(DATA and VOICE)
-192.168.14.1/24 DATA
-172.168.0.1/24 VOICE
SF100-48 will also have 2 VLAN(DATA and VOICE)
-192.168.14.1/24 Desktop/Laptops
-172.168.0.1/24 IP phones
Problem is when I tried to assign IP to any VLAN's the switch will just hang and loose my connection the light will stop blinking it will steady and i unable to access the switch until i turn off again?
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Mar 18, 2012
I want to setup VLAN with the switches SG300 and SLM2024. What is the suggestion to connect these 2 switches. We have the Juniper net screen.
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Jan 19, 2013
I have a power conncet 6224 with routing enabled with several VLANs setup.VLAN Database: 6,8,10,90-254VLAN 6 is our management vlan10 is for our core network services (DNS, Domain, Exchange etc)90-254 are isolated vlans.What I need to accomplish is to prevent vlans 90-254 from communicating with each other and only allow communication to VLAN 10 and the internet. All internet firewall work will be handled by our Sonicwall. [code]
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May 14, 2013
I'm trying to set up per vlan routing on a 3560G switch but it's not performing as I would expect. I've got a server on the 109 vlan with a 10.1.9.100 address and a default gateway of 10.1.9.1 this address is an HSRP gateway and currently resides on 10.1.9.7. When I traceroute through to my user PC on the internal network it receives a response from 10.1.9.7 However, it is then denied by an ACL on the internal firewall which has been applied to interface Eth0/0. It should arrive at the firewall on Eth0/2.109 as it has the 10.1.9.4 address.
My goal here is to route traffic on the 101 vlan to a seperate interface on the internal firewall from 109 vlan traffic. I'm either doing something wrong or these routing commands aren't designed to work in the way I'm expecting (I couldn't find any documentation on the ip route command where it is followed by different gateways for different vlans)
interface GigabitEthernet0/12
description Internal-FW Eth0/2
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 109
switchport mode trunk(Code )
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Nov 14, 2011
I am trying to set up VLAN on my cisco router, where do i check for the setting for creating a VLAN on my Wireless AP. Is it possible on this model.
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Jan 30, 2012
I have a Cisco 3845 Integrated Service Router and I have installed a Service Module. I want to use the integrated Gigabit ports as switch ports and put ports in the Service Module and Gigabit port in a VLAN.
Is this possible? can it be done by setting internal Gigabit link as trunk and how? Below is the somewhat the setup i am looking for
Service module
fa0/1 |
fa0/2 | Vlan X
fa0/3 |
[Code]....
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Oct 25, 2011
I need to setup a vlan between the 6509 and 2621 router. This needs to be a VLAN (200) the runs between the devices that uses DOT1Q trunking. The end result is all the networks (vlans) on the 6509 can talk to the LAN on the 2600 (10.133.22.0 / 23) and visa versa.
Device 1
6509 with CatOS / IOS
Config I did on the MSFC:
Interface Vlan 200
ip address 10.10.10.1 255.255.255.248
[code]....
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Dec 19, 2012
I am attempting to upgrade from a Cisco3945 to a ASR1002. On my Cisco3945, I have interface associated with VLANs. It appears that with the new IOSX, VLAN configuration has changed. Any config to setup a simple VLAN?
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Nov 13, 2011
I am trying to setup a network using Cisco 2960 switches with vlans configured. One vlan will handle video coming from four cameras that are connected to another 2960.
We have four cameras feeeding one port each on a 2960, that 2960 in turn feeds one port on the main 2960 which is the video vlan for that site. From the site it goes back to a Cisco 3750 to be sent over to a Sonicwall firewall. If we connect to the 2960 that the camera are connected to we can see the video, but not on the main site 2960.
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Mar 31, 2012
We have recently purchased a SG300 to break up our network which most consists of virtual machines via Bridged networking on network machines. I have created successfully Vlans and the physical machines are capable of communicating across the different subnets that I have created via the SG300 however the Virtual machines can no longer be reached.
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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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Jun 6, 2012
I have a connection on IP 192.168.1.21, Subnet 255.255.255.0 - this is on the default VLAN1 on the switch. I need to route this to IP 10.0.3.101, Subnet 255.255.252.0 - which is set up on VLAN2 on the switch. I have set the switch to Layer 3 via console.
how I setup this route? I am use the Browser based interface.
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Mar 17, 2012
configure my new SG300-28P. When I have started the switch, I have specified a new password and enabled telnet in order to setup the switch in Layer 3 mode.
After a restart, the switch took its IP address from a DHCP server. When I try to set a static IP address (192.168.2.1), I receive the following error message: Duplicated IP interface on the same subnet.
The IP address 192.168.2.1 is not used by any device within the network. For information, the message doesn't appear when the switch is in Layer 2 mode.
why I can't change the IP address of default vlan in Layer 3 mode ? All I can do is set the IP address to static or dynamic.
For test purpose, I have added 2 vlans. But I wasn't able to route traffic between vlan. how to configure the switch to route traffic between vlan?
find below details informations about my VLANs.
- Default (VLAN ID 1)
IP Address : 192.168.2.1
Subnet : 255.255.255.0
[Code].....
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May 30, 2013
I have an Ubuntu 10.04 and basically I would like to achieve this:When I am at home, switch the network to use static IP.When I am at the office, switch the network to use DHCP.
Is there a program to do this?Or is this something that should go inside an init script where if it is weekend or weekday from 7 pm to 7 am, then consider it a home. If it is home, then use static IP.?
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Feb 26, 2013
My organization wishes to host a LAN gaming event. The setup I have in mind involves a 24-port switch for connecting all the player computers and having that switch connected to a smaller "core" switch which has the the game server and router connected to it. I'd like to know if I can set things up as follows...
SG200-26 with ports 1-24 on seperate VLANs so they cannot talk to eachother. I'd then like ports 25 and 26 to be an aggregated (for bandwidth and redundancy) trunk port to carry all 24 VLANs plus an additional management VLAN (ex. VLAN 100) that will be used for accessing the switch. I'd like those aggregated trunk ports to connect to an SG300-10 "core" switch which will be connected to the game server and to a router for internet access.
I'd like the ability to have two network connections from the game server to the switch, one on the management VLAN and one on a different VLAN (ex. VLAN 50) that will be accessed by the players (ports 1-24 on the SG200-26). The core switch needs the ability to perform restricted inter-VLAN routing, in that it doesn't allow VLANs 1-24 to talk to eachother but they can talk to the server's VLAN but only through specific service ports (ex. port 12345, 12346). Is this possible?
Furthermore how would I configure the SG300-10 to allow VLANs 1-24 to talk to VLAN 50, but not themselves or VLAN 100. As well, I'll probably have the router on it's own VLAN (ex. VLAN 60) and allow VLANs 1-24 to access it but only through HTTP port 80 for web access.
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Dec 31, 2012
I am getting very frustrated trying to modify/create ACL's on my SG300-20 switch.I have the switch in L3 mode. I have created several VLAN's and ACL's for each VLAN controlling their access to each other. After the initial setup, I have started trying to create more VLAN ACL rules to allow more access between the VLAN's. The problem I keep running in to is that when I go to modify the ACE's in the ACL, I keep getting the error message "Entry already exists". For example, I go to modify the port ranges to tighten them up, and try to save the ACE after modifying it, and I get that error message.
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Nov 8, 2011
Is there a way to set up Quick VPN on the RV120W without changing the internal subnet? I have just taken over responsibility for a network and I don't know all of the nooks and crannies yet, so I'd rather not change the internal sub net. I've tried setting up a user then changing the LAN settings afterward, but it automatically removed the VPN user when I did so.
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Jan 10, 2012
Between our hosting and a customer we have an extended vlan, traveling on a fiber, between two cisco 3560 switches.The thing is, that we want to create one or more vlans inside that extended vlan, in some way if possible?
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Jan 10, 2013
I have two networks at two sites with a dot1q trunk between the two L3 switches at both sites (no routers involved)
SITE A - Cisco 3750 L3 - VLAN ID 50
10.10.50.0/24
SITE B - Cisco 3750 L3 - VLAN ID 50
10.20.50.0/24
I would like to extend the SITE A VLAN to SITE B so that I can move hosts from SITE A to SITE B without needing to change their IP address but the vlan ID is already in use. Obviously the easy solution is to change the VLAN ID for one or other of the sites but both sites contain hosts that run 24/7. Is there a way to join two VLANs with different IDs together.So for example I create a new VLAN 60 at SITE B and associate it with VLAN 50 at SITE A.
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Mar 31, 2013
i need to solves this little problem on 2960S lan BASE but i dont know if it is possible.
Uplink port config for gi 1/0/28 is:
switchport mode trunk
switchport trunk alloved vlan 10,11
but on interface gi 1/0/1 i want to have data from vlan 10 tagged as VLAN 20.
At this time i have solved this issue very primitively
I have set up gi 1/0/2 as int mode acces, acces vlan 20 and i have connected gi 1/0/2 with gi 1/0/3 with eth cable. int gi 1/0/3 is switchpor mode acces, switchport acces vlan 10
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Aug 12, 2012
I have "inherited" a Catalyst 4506 with IOS version 12.2(20)EWA1 and Supervisor IV already installed. We recently purchased a second Supervisor IV and I am looking to install this second supervisor for redundancy. Is there anything special with installing a second supervisor or so I just physically install the new supervisor and the IOS will automatically set everything up?
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Dec 15, 2012
while i am configuring a port on switch .The switch reloads.After reload the show version says
System returned to ROM by bus error at PC 0x458F6C, address 0x0
show version from the effected switch is
Cisco IOS Software, C3750E Software (C3750E-UNIVERSALK9-M), Version 12.2(58)SE2, RELEASE SOFTWARE (fc1)
Technical Support: [URL]
[cODE].....
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Dec 13, 2011
We have cisco 4506 and this got reloaded automatically and showing reload in show version output but no one made switch reload.
CORE-SW-2 uptime is 8 minutes
System returned to ROM by reload
System restarted at 12:37:58 IST Wed Dec 14 2011
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Mar 19, 2012
working first time on switch 4507 , this is my 2nd week and i plug the console on this 4507 switch , the switch reboots automatically it comes to stage mention below and reboots. My question is i have not seen any error message on this switch and it reboots automatically so what is the problem.
* *
* Welcome to Rom Monitor for WS-X4013+ System. *
* Copyright (c) 1999-2003 by Cisco Systems, Inc. *
* All rights reserved. *
* *
**********************************************************
Rom Monitor Program Version 12.1(20r)EW1
Supervisor: WS-X4013+ Chassis: WS-C4507
[code]...
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Sep 16, 2012
I have a 3750G switch in my production network that only has VLAN 1 on it. All ports are in a default state and VLAN 1 is disabled. The switch is passing traffic but shouldn't having the default VLAN shut down cause the ports not to pass traffic? If I start to create VLANs will that cause the switch to stop passing traffic?
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