Cisco Switches :: SG300 / Locating Connected Upstream Switch?

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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Cisco Switches :: SG300 Stacking And Powered From POE By Upstream Switch?

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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Cisco Switches :: SG300-10 Ethernet Connected But No IP Connectivity

Apr 28, 2013

I have a strange problem with a SG300-10 (our first SG300) working as a desktop switch.When a PC that is connected to the switch is powered off and is later (a few minutes or next day) switched on, the PC has a ethernet-connection to the switch, but no IP-connectivity.The PC-statistics shows that ethernet is connected and it sends packets, but the PC does not receive any packets.At the same time the SG300 statistics for the port says, that the ethernet is connected (same paramaters as the PC) an that the switch is sending IP-packets (broadcast and unicast) to the port, but does not receive any packets. The switch shows follwing entries in the ram log for the port: [code]

With the older firmware 1.2.9.44 the IP-connectivity worked after waiting 5-10 minutes.With the new firmware 1.3.0.59 I can wait even 15 minutes, there is no change and nothing happens.But when I change some "unimportant" parameters of the port (i.e. change port speed from autonegation to fixed 1000M, or vice versa) and then save the running configuration to the startup-config, around 5-10 Seconds after the configuration is saved, the port gets full IP connectivity and after that works fine (until the PC is switched OFF and ON the next time).This is a very strange behaviour. As "PC" I have tested this with HP-workstations, Lenovo Thinkpad and a MAC Mini. The switch "reacts" to all the same.Following I have attached the config of the switch. [code]

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Cisco Switches :: VTP And STP On SG300-28 Switch

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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Cisco Switches :: LAG Configuration On SG300 52 Switch?

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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Cisco Switches :: SG300 Can PC Manage Switch And Get Data From It

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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Cisco Switches :: Ip Address To Vlan In SG300 Switch

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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Cisco Switches :: Set Up New SG300-52 L3 Switch For Switching And Vlan

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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Cisco Switches :: SG300 Switch - Device Swamped

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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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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Cisco Switches :: Ip Routing Command On SG300 Switch?

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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Cisco Switches :: System LED On SG300 Switch Constantly Flashes

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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Cisco Switches :: Routing Between Two Vlans On An SG300 Series Switch

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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Cisco Switches :: Getting DHCP Relay To Function Properly On SG300-20 Switch

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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Cisco Switches :: Can SG300 Connect With Catalyst Switch On PVST+ Mode

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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Cisco Switches :: SG300 Correct Configuration For Redundant Link Between Two Switch

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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Cisco Switches :: Configure Port To Connect SG300 To 3com Unmanage Switch?

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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Cisco Switches :: SG300-28 GUI Different Than Online SG300-48 Simulator

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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Cisco Switches :: SG300-28P And SG300-52 Web Managing - Fans

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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Cisco Switches :: SG300-28 Uplink To Another SG300-28?

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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Cisco Switches :: Difference Between SG300-28P And SG300-52

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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Routers / Switches :: Wired Router Is Upstream Of A Wireless Is It More Secure

Dec 22, 2011

2 routers in series, is one more secure. I recently asked about setting up two routers in series as routers, one wireless one not. It was my understanding that the computers on the second router would not be visible to computers on the first router, the wireless one. My assumption was that this would make it more difficult for someone who got access to the wireless router to also access those computers on the second router.

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Cisco Switching/Routing :: Host Nic Teaming To Upstream Nexus 4001i Switches

Sep 24, 2012

Having a design where an IBM bladecenter has two Nexus 4001i switches and each switch is connected to a Nexus 5k vPC pair, is it possible to configure active-active nic teaming on the hosts (blades) considering that the Nexus 4k switches are unaware of each other and blade has one connection to each 4k over either emulex or qlogic 10G CNA?

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Cisco Switching/Routing :: 3750 Stack To Upstream ISP Separate Switches - MAC Flapping

Mar 11, 2012

I have an issue with a Cisco 3750 switch stack which is connected to two seperate upstream Cisco 3750's which are administered by an ISP.  The ISP is experiencing MAC address flapping from one of my VLAN SVI's i am using to route traffic upstream
 
[code]...
 
As you can see I utilise a VLAN SVI to route traffic to the upstream 1.1.1.2 (illustration only) IP.  As per the diagram of the topology attached, the ISP is receiving a MAC address flapping error confirming the SVI MAC address from my switch stack is being learnt on the trunk port connecting switch 1 and switch 2, and also the port (Gi1/0/48) directly connected to my switch stack. As these are all Layer 2 links essentially being passed upstream and then connected between the two ISP switches, we have a 3 way triangular loop formed.
 
If I was to remove the port channel configuration from the two ports associated with the VLAN SVI, am i right in suggesting this would still form a layer 2 loop?  The two ports would still be a member of the SVI VLAN, and it is the VLAN MAC address which is being learnt by the two ISP switches on different interfaces.

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Cisco Switches :: WAP4410N Set As Repeater And Not Connected To Gigabit Switch

Jun 30, 2012

From the broadband modem/router connected with a  Gigabit 8 port unmanaged switch.  Then, one WAP4410N is connected to the switch, wired connection for a distance of 90 meters.  WAP4410N is set as an access point to the area.  Then the second WAP4410N will be run as a repeater to the first WAP4410N.  My question is that, can we set the second WAP4410N as a repeater, without the need for it to be connected to the switch via ethernet cable.

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Cisco Switching/Routing :: Standby Blade Switch 3030 Upstream Port-channel Flapping Up-down

Apr 30, 2012

show logging

May  1 16:00:30: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/12, changed state to down
May  1 16:00:39: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/12, changed state to up
May  1 16:17:28: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/12, changed state to down
May  1 16:17:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/12, changed state to up
May  1 16:25:28: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/11, changed state to down
May  1 16:25:37: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/11, changed state to up
May  1 17:19:25: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet0/11, changed state to down
  
Configuration as below:

macro name vmware
switchport trunk encapsulation dot1q
switchport mode trunk
no switchport access vlan

[code].....

Note:Both active blade switch and standby one are connecting to same aggregate switch 3750. Yet the active one, with same config as standby one, has not occurred this issue.

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Cisco Switches :: Replacing 3COM 4500 Switches With SG300-52?

Nov 21, 2011

I'm replacing 2 3COM 4500 Swithes with the SG300-52 Cisco switch. We have 3 VLANs, 10, 20, 100. The switch is set for Layer 3 and I have setup DHCP relay. what settings i should set on the Cisco for the following setups:
 
3COM Setup
#
interface GigabitEthernet1/0/1

[Code].....

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Cisco Switches :: SG300 Switches Have Poor Performance In Layer 3?

Jan 1, 2013

We have several of the SG300 Serices switches. We use them to route VLAN traffic to Remote Offices, Internet Connections, and WiFi Access Points.In one remote office we have a SG300-10 setup to route the HQ Network and the remote Office Subnet. The SG300 is Connected to HQ via Fiber and has multiple Tagged VLANs on it. If I do speed tests over the Fiber Link on the Incoming Tagged Netwotk I get Decent performance, 80Mbs. If I switch to a networtk that is not priginating from HQ, and have the SG300-10 route packet, I get dismal performance. 15-20Mbs.
 
I Fireded up a New SG300-28P FW v1.2.7.76. Added a the HQ VLAN 101 and new VLAN 1025 . Mapped some Tagged and untagged ports for each.  Switch was connected to HQ Network as untagged VLAN 101.  I put a laptop on an Untagged VLAN 101 port. Ran some tests, cam back with 750-850Mbs. Great.  Put the same laptop on a Tagged 101 Port, Configured the NIC for Tagged VLAN 101, Same test, same Speeds, 750-850Mbs.I then  Configured laptop for Tagged VLAN 1025. Connected to tagged VLAN 1025 port. Ran speed tests, resuts were 15-20Mbs!
 
I then  Configured laptop for Untagged VLAN 1025. Connected to unagged VLAN 1025 port. Ran speed tests, resuts were 15-20Mbs!It was only the Laptop and the Connection to the HQ net on the SG300-28P. Why is the performance of this unit soooooo poor when it needs to route?Other Switches have FW v1.0.0.27 or FW v1.1.2.0. They have Similar speed issues. All Configured for Layer 3.

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Cisco Switches :: SG300 Switches Can Be Used With Microsoft NLB In Multicast Mode

Dec 18, 2011

does the SG300 switches can be used with Microsoft NLB in Multicast mode?I know on traditional Catalyst switches you can statically "map" IP's to mac's and then to multiple ports but this doesn't seem to work correctly on the SG switches - it gives an error about the mac not being not Unicast?

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Cisco Switches :: VLAN Management Via SNMP On SG300-10 Switches

Aug 7, 2011

Any snmpset commands to add, modify and delete vlan table entries on SG300-10 switches? I checked url... however this information is apparently only valid for catalysts. The latest firmware is installed and the provided MIB files are used.

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Cisco Switches :: Multiple VLANS And SG300-28P Switches Setup?

Aug 20, 2012

I'm going to have several SG300-28P switches to setup.  I'll need to create multiple vlans for data, voice, and wireless traffic.  I have the following questions in setting up this configuration:
 
VLAN 1 Management
VLAN 100 Data
VLAN 200 Wireless
VLAN 300 Voice 
 
1) For managing the switches via IP, will LAN1 be the default management network?  Should I create a seperate VLAN for managing the switches?
 
2) For uplinking the switches together, I plan to trunk a port to connect the switches together.  What's the configuration on the trunk port to forward all vlans from one switch to another?
 
3) On some ports, I want to configure a trunk for two vlans (Data and Voice) where the phone has a pass through for PC.  The phone supports tagging for the PC and the VoIP traffic.  For example on port 10, would VLAN 100 and 300 be set to tagged?

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Cisco Switches :: SG300-52 Multiple Lags Between Switches?

Jan 19, 2012

I'm having alot of trouble trying to connect more that one LAG between two SG300-52 switches.Basically i have configured both switches with the same vlans. For 2 of the vlans i would like to connect them together between the two switches using LAG. Switch1 has Vlan 5 (ports 1-12) & Vlan 10 (Ports 25-36) with LAG configured on ports 1-2 and ports 25-26. I have setup the second switch identical to the first. But when i connect the LAG's there is no connectivty. If i disconnect one LAG the other starts working.Can you only have i interconnect LAG between switches?

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Cisco Switches :: How To Configure Two Links Between Switches SG300

Apr 22, 2012

I have two SG300 serie switches and two Gigabit connection between them. How do I configured these two links to work toghether like a one 2 Gigabit channel?

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