Cisco Switches :: Connectivity With SGE2000 In Ring Topology?
Oct 10, 2012
I´ve got a strange problem with the connectivity within a ring topology.There are five switches from the SGE2000 series and one SG200-50.The SG200-50 is the root bridge and RSTP is configured.From the root bridge switch (Switch 5) I can ping Switch 0.But I cannot ping Switch 0 from PC0.
On the other hand I am able to ping all other Switches (1-5) from PC0.In addition to that I can establish a RDP connection from PC0 to Server0.This tells me that there is no general problem with the connection from PC0 to the Switch0.
Right now when I want to configure Switch0 the only way is to connect to Server0 first.But we have to move Server0 and this is why I want to manage Switch0 from PC0 like any other Switch on that network.
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Feb 2, 2012
the by-pass mechanism used to isolate the fault if any link fail.
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Jun 26, 2011
I have a Campus LAN setup which is layed out using Cisco SRW2024 and SGE2000 SB switches. On the LAN we are running various services. These are CCTV, VOIP(SIP), Public Address(multicasting) and Internet hotspots to various locations. I have attached a layout of the setup. A unique VLAN is setup for each of these services.The problem we have is that the PA audio is breaking up at intervals making the output distorted this is also happening for the SIP phones within the facility. Using the user guide we have tried to setup QoS on the system but we seem not to improve the services.
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Apr 2, 2013
I need to setup a layer 2 network consisting of 14 switches interconnected in a ring. Obviously, the design of 14 switches in a ring network is dumb, not here to debate that. Unfortunately, it HAS to be a ring. I've been researching the best way to configure RSTP for this. From everything I've read all I really need to do is configure Primary/Secondary root bridge in the center, and change the Maximum Age field to at least 16 seconds? From what I've read you want a minimum of 3 second buffer + 1 second for each hop due to message age being added by each switch hop?
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Apr 26, 2011
I am looking for a Best Practices or a few places to pay attention to in the Cisco ESW-520-48P switch I have. My VoIP solution is RingCentral, and while they are Cisco phones, I've been hestitant to setup VLANs etc. the way I am used to. Plus setting up Auto QoS seems different than what I am used to with a 3750 switch.
Right now I've left the Smartports Wizard alone, and none of the ports are configured. There are no VLANs or QoS on the LAN currently.
What I was running into were calls cutting out where one side wouldn't hear the other anymore, but the call would remain connected. However, this has happened in this small 15 person office, when there is only one employee here after hours, talking on the phone. There isn't any heavy network traffic, because I have network monitoring showing me low usage (no streaming music, videos, or anything else).
This switch has a Gb connection to a Linksys SR2024 (the server switch), which is also set at Factory Defaults. I mention that because I recently bypassed the ESW-520-48P, and plugged one phone into that switch and the RingCentral phone worked fine for outside calls.
Is there something besides QoS that I should look at in the ESW-520 switch that might be causing a checkpoint of some sort, or interrupting VoIP traffic that I need to configure or disable?
And are there any Best Practices or scenario guides for this switch? I found the Admin Guide, but it really just explains every option in the GUI for the switch. And it seems all of my CCNA training isn't working with going in and quickly troubleshooting this switch besides knowing that something in it could be hanging it up.
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Aug 22, 2011
I'm having trouble getting a stack of three sge2000 switches to connect together and NOT reboot.Two of the switches are older Linksys sge2000s and they stack well together, but as soon as i connect the new Cisco sge2000, it will make them both reboot sequentially, even though it detects that it needs to be #3 in the stack.SW 1 port 24 is connected to SW 2 port 12 and they function correctly (both of the linksys switches). The documentation states they should be connected in a ring topology so I first tried completing the loop with SW3 (the newer cisco sge2000). When that had the aforementioned troubles I just connected SW2 port 24 to SW3 port 12. Still forcing the switches to reboot.I SUSPECT it may be a firmware/software issue, but I wanted to check if they'ed even work together.
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Nov 14, 2012
Can MGBSX1 transceivers use on SGE2000? what type of transceivers can be use on SGE2000.
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May 10, 2012
What is the difference between a SGE2000 and a SG500-28?
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Jul 17, 2012
I am running the SGE2000 as my l3 core switch with multiple inter-vlans.
have a customer requirement that needs to restrict eg. GUEST-VLAN10 to all other VLANS in the network. Only allowing access to the internet.
It seems on the switch i am able to bind ACL to per port interface. if this is possible on the SGE2000
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Apr 27, 2011
Searched through conference and still have no resolution.Switch: Cisco SGE 2000..Layer3 mode enabled through console. [code]
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Oct 18, 2012
I'm trying to get a network of SGE2000 switches mapped into Cisco network assistant.It always comes back with the device type unknown and status unsupported device.Is there a way to fix this ? I'm using Cisco network assistant ver.5.7(6)
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Jun 27, 2012
Where I could find an SGE2000 visio stencil? It isnt listed in the Cisco Visio Stencil page?
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Aug 18, 2011
configure a secondary ip address (over the same address range) in a vlan interface on the SGE2000?For example, I want Interface Vlan 10 on mw switch has 172.16.10.1/24 and 172.16.10.2/24. Is that possible? If I try I get an error message with a duplicate IP address error. On Catalyst switches it can be done, but on Small Business?
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Jun 25, 2012
DHCP Relay on a SGE2000 switch.I have configured two VLANs on the switch, VLAN2 (192.168.10.x/24) and VLAN3 (192.168.9.x/24). I have the switch in Layer 3 mode. I have configured the DHCP relay server of 192.168.10.4 and the DHCP Interfaces as VLAN3. All of the IP Static Routes were generated by the switch.
If I put a client computer on a port that is Untagged VLAN 3 and try to get a DHCP address from the server on an Untagged VLAN 2 port I never get a response back.I have done some packet captures and here is what I have found:
I see the DHCP broadcast on the client computerI see the DHCP Request on the DHCP server coming from the IP assiged to the switch on VLAN 3 (192.168.9.254)I see the DHCP server respond with a DHCP OfferThe DHCP offer never gets to the client computer I can't seem to get a DHCP address to any system not on the same VLAN as the DHCP server. Option 82 is disable and I did try enabling it, which made no difference.
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Nov 21, 2011
Does the SGE2000 supports NetFlow? I've checked the Cisco docs and also called Cisco support to which no one has been able to answer me.
Anyhow, just in case it doesn't support NetFlow, how to be able to set up something that would be able to check the bandwidth usage on each port?
I've got a problem where I think the SGE2000 switch is failing when I pump around 190~200Mbps through x2 of the ports (Server A on port 1=130Mbps and Server B on port 2=60Mbps) of Multicast traffic (UDP). I can measure the output from the Streaming servers that provide the multicast content, thats how I know the input to the switch and I know that there are no packets lost or any errors departing from the servers, yet when I increase server B to say 80Mbps, I get break up and all sorts of problems on the client end STBs and it is happening on the multicast content provided by Server A too which is a different source, so I'm 99.9% sure its a SGE2000 switch problem which is why I'd like to monitor it somehow.
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Nov 24, 2012
We have a couple of cisco SGE switches connected to a single DELL, between the cisco switches we have a trunk interface. I'm not sure which setting should be configured on the switches to get it working because a loop is occuring.
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Jan 19, 2013
I currently am using the SGE2000 switches for our datacentre and they have run great. We are looking at replacing them as part of our normal equipment refresh and have questions about what is the best switch for us. We are looking at upgrading to at least 48 port switches which isn't a huge issue.The main purposes of the switches will be for iSCSI traffic between Starwind SANs and Vsphere 5.1 hosts. We had some latency issues with one of the SGE2000s but otherwise they've been great.
We also will use these switches to handle our feeds from our ISP and our normal interserver communications. We have had DDoS attacks in the past of 40k packets per second and 600mbps and the SGE2000 never even flinched. We don't need it for any layer3 routing (which we use virtualized PFsense for). Looking at the Miercom report the SG200 series looks like it would be fine for us but I'm just worried around the part which mentions it becoame unresponsive in a DoS attack and also whther it may be slower for iSCSI. Both series seem to support flow control and jumbo frames.
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Sep 18, 2012
I have a Linksys SGE2000 Switch and I've been trying to get Vlan's to work.How I'm trying to setup is like this
Port 1 - Vlan22 - Plugged into trusted port in firewall
Port 3 - Vlan25 - Plugged into DMZ in firewall
Port 15 - is plugged into a VMWare host. The network is setup as production is Vlan 22, DMZ is Vlan 25.
Port 16 - Internal server so is Vlan 22
Both Vlans have a different IP subnet.I think I have port 3 configured ok as it's only one Vlan. I'm trying to get Port 15 configured properly and it won't work.Servers on VMWare hosts are Windows Server O/S.
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Nov 17, 2011
We have been set the task of securing a small managed office system which is currently set up with a standard switch allowing each of the offices (containing different companies) to see each other, and in some cases, access each others documents across the network.
Obviously this is a far from adequate set up and our aim is to isolate each office using VLAN's but share a common internet connection provided by the managed offices. We have two Cisco SGE2000-G5 layer 3 switches but we are new to Cisco equipment and VLAN's so we are not quite sure on how to implement this. DHCP would need to be provided by a Router, there is no Server. We are open to suggestions on the Router as we have yet to purchase one.
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Nov 7, 2012
We've been trying to monitor the used bandwidth of our SGE2000 and SGE2010 switches with Nagios.We've been experimenting with the various OIDs and we've found the OIDs linked to the different switchports.
Though when we use SNMPWalk (to find the OIDs connected to the port) the names of the ports are all the same.
[code]....
Is there a way to change the names of these interface to unique names?We've already given unique names in the description field through the switch's GUI, but it doesn't make any difference for Nagios.
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Apr 19, 2012
We have a standalone Cisco SGE 2000.
We lost connectivity to the web user interface - it no longer responds on the configured IP address.From the manual we see that by default the switch get its IP address via DHCP - but we find no record of any ip address assigned to this switch.Is there a IP address that this unit defaults to when DHCP is not available? Also - what is the best way to connect to the console using Windows 7?
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Jan 10, 2012
I am trying to update the SGE2000v1.0 with 24ports to 3.0.1.0: url...I got the error "illegal software format" using tftp.
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Aug 11, 2011
The switch sge2000-g5 a small business switch, has a redundant power supply port built in the switch. It is a port that handles a 12v power supply. My problem is to find the exact device to supply the power to this port so I can have, obviously, a redundant power in my switch. This switch is actually out of production.
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May 22, 2011
I am trying to configure MSTP on Layer-2 network at work. We have multiple switches connected on Wireless point-to-point links with redundent links.MSTP is configured with multiple regions. All the servers are located in RegionA and other regions are connected to RegionA via multiple links.
There are 3 SG-300-10 switches in RegionA --- SwitchA_1, SwitchA_2 and SwitchA_3.One of the simple regions (RegionB) has a single SF-300-08 switch (SwitchB) connected to SwitchA_2 via port e7 and SwitchA_3 via port e8. Hello Time, Forward Delay and Max Age are at their default values of 2, 15 and 20 respectively. The link between SwitchB (port e7) ---- SwitchA_2 is the primary link with cost 200,000 and the link between SwitchB (port e8) ---- SwitchA_3 is the backup link with cost 500,000.
The log on SwitchB is shows in the table below. As it is seen from the table there are frequent topology changes for very short duration (1-4 seconds) before the topology settles back to the configured one. (Primary link forwarding and secondary link blocking). During this time there have been no link failures reported.Same thing is also observed within RegionA (SwitchA_1, SwitchA_2 and SwitchA_3 are connected to each other).
How to stop these frequent topology changes? The topology changes within RegionA causes a lot of PPPoE sessions to reset and re-establish.Is there any way to find out what triggers these topology changes?
21474646232011-May-24 13:54:15Warning%STP-W-PORTSTATUS: e7 of instance 1: STP status Forwarding21474646242011-May-24 13:54:15Warning%STP-W-PORTSTATUS: e7 of instance 0: STP status Forwarding21474646252011-May-24 13:54:15Warning%STP-W-PORTSTATUS: e8 of instance 1: STP status Blocking21474646262011-May-24 13:54:15Warning%STP-W-PORTSTATUS: e8 of instance 0: STP status Blocking21474646272011-May-24 13:54:13Warning%STP-W-PORTSTATUS: e8 of instance 1: STP status Forwarding21474646282011-May-24 13:54:13Warning%STP-W-PORTSTATUS: e8 of instance 0: STP status Forwarding21474646292011-May-24 13:54:13Warning%STP-W-PORTSTATUS: e7 of instance 1: STP status Blocking21474646302011-May-24 13:54:13Warning%STP-W-PORTSTATUS: e7 of instance 0: STP status Blocking21474646312011-May-24 12:53:22Warning%STP-W-PORTSTATUS: e7 of instance 1: STP status Forwarding21474646322011-May-24 12:53:22Warning%STP-W-PORTSTATUS: e7 of instance 0: STP status Forwarding21474646332011-May-24 12:53:22Warning%STP-W-PORTSTATUS: e8 of instance 1: STP status Blocking21474646342011-May-24 12:53:22Warning%STP-W-PORTSTATUS: e8 of instance 0: STP status
[code]....
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Mar 24, 2013
I've been taught/under the impression that vlans and stp stay in the access layer to prevent bridging loops and broadcast storms from taking down the whole network. Well I was reading about backbonefast and how it "Enables fast convergence in the networkbackbone or core layer switches after a spanning-tree topology change occurs." Now I thought that from the distribution layer up we use a routing protocol.
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Jun 12, 2011
i found that cisco small business SF302 PoE managed switch connect with the end device (RFID component) would causing packet drop issue.how should i isolate the issue and proper troubleshooting? would it cause by the PoE issue, or the 10/100 base etc.
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Dec 27, 2010
I'm planning to use 2 3560X (access switch) on two different locations connected over two 2921 routers in small ring. 3560Xs are directly connected via fiber. Each 3560X is conected to its own 2921, and 2921s are connected together with GRE over IPSec. So they are creating ring.I'm planning to use small area 0 in this scenario. There are less then 200 routes in the network. Will 12.2(55) IP Base on 3560X support this scenario or I will need IP Services image? "OSPF for routed access" is still little vague to me, there are only tipical case study scenarios.
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May 25, 2011
I have a AS2511 device connected to the console ports of two switches console. I needed to have a LAN connectivity to these switches from the AS2511 device. Can we use the RJ45 serial ports in the AS2511 to achieve this?
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May 28, 2012
I've looked in many places but cannot see how or if it is possible to configure a phone, in CUCM to have a feature ring instead of the normal ring.In CUCME you go into the ephone x configuration mode, and assign the DN to the phone with the button xfx command. What this gives you is a slightly different ring tone when a call comes through. If I am not mistaken it is the same ringtone they use on the show "24".Is there a way to do this "feature" with CUCM?
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Dec 5, 2011
My customer wants to replace some Cisco 2912 by new routers, but I can't find a way to add Token ring Network Module on 2951 or 3925 routers with the Cisco configuration tool.Does token ring is still supported on ISR G2 routers?
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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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Mar 12, 2012
has anyone here played around with uploading compatible audio files for custom rings and MOH and/or personalized backgrounds for the phones? I was only taught the basics in our CUCM v6.0.1 and am looking to figure out how to get some good music on my phone as well as play around with other "cosmetic" features. The phone I'm testing with is a 7971(color).
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Feb 26, 2013
At our office we have a weird performance problem with the following switches and connectivity:
Internet |
SG300-24 (L3) core switch (in our server room)
|SG300-10P (L2) access swtich (in our meeting room) |
SG500-28P (L3) switch (in our meeting room)
We are building a new computer infrastructure that is connected to the the SG500-28P. As you can see above the SG500-28P in our meeting room has an uplink to the SG300-10P in the same meeting room. And again the SG300-10P has and uplink to the SG300-24 in our server room. From the server room, there is connectivity to internet. The network uses a multiple VLAN's and routeing between them. Bootom line is, the internet VLAN ID 10 is tagged to trunk ports and available on the SG500-28P. So client get connected straight into the internet based VLAN.
The performance on the SG500-28P switch itself from VLAN to VLAN is very fast. But... the uplink connection tot the internet and other VLAN's on the core switch are very and very slow! At least 10 times slower than normal. So if I plug a laptop in the SG500-28P and go from uplink to uplink, it is slow! But... when I connect the same laptop to the SG300-10P the connection with only one uplink it is fast. As if three switches is to much. I can't figure out why.
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