Cisco WAN :: SGE2000 G5 VLAN Causes Internet Speed Degradation
Aug 7, 2011
I have a problem with a test network configuration i'm trying to set up. I have an SGE2000 G5 switch for LAN traffic, and i have "reserved" 3 ports with a VLAN to obtain two separate internet lines with two different public IPs from my ISP internet cable. Now what i've tried to do is connecting the ISP cable to the port1 of the VLAN, and i've connected the other 2 ports to my routers. The problem is that when doing this, port1 switches to half-duplex mode and the result is a huge performance degradation (0.28Mb DL instead of 16Mb approx.).
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Mar 20, 2012
I'm having issues with my download speed lately and I need to know whether it's my router that's causing the problem or my ISP.When I leave the router on for a couple of days, without rebooting it, my download speed degrades to about 40-50% of what it usually is and when I reboot it the speed is back to normal.It's a 150Mbps Wireless N router, model SBN WR11N R2. I have no idea what brand it is, my ISP gave it to me a few years ago. Seems to be running some custom firmware installed by the ISP.
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May 15, 2012
Im planning for a network upgrade.77.110.87.112/28 - is assigned to selected users and configured manually.(note: they are public IP which our ISP assigned)192.168.1.0/24 - is assigned to users that are not allowed to use internet services and configured manually. I have CISCO 1841 Router connected to the internet and CISCO SGE2000-G5 24ports layer 3 switch that is connected to cisco 1841 router.i want to create vlan in layer 3 switch. [code] i want all vlans would still ping to each other and file/printer sharing is available.kindly check if my network upgrade plan is correct, how am i going to configure those vlan in my layer 3 switch and to connect to the internet.
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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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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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Apr 5, 2012
I'm troubleshooting one way audio with our anyconnect phones.I think it is a routing issue.typically I wouldnt run debug ip packet detail on a production router, however I just found out that you can use acl's to specify the traffic to be debugged.
R1(config)#access-list 199 permit tcp host 10.1.1.1 host 172.16.1.1
R1(config)#access-list 199 permit tcp host 172.16.1.1 host 10.1.1.1
R1(config)#end
R1#debug ip packet 199 detail
IP packet debugging is on (detailed) for access list 199
The use of debug commands requires the allocation of system resources like memory and processing power and in extreme situations can cause a heavily-loaded system to stall. Use debug commands with care. Use an ACL in order to selectively define the traffic that needs to be examined to reduce the impact of the debug command. Such a configuration does not filter any packets.
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Nov 27, 2011
I have three ESW-540-24 10/100/1000 Switches in a small school environment
1. ESW performs as a server switch for out small cluster of VMWare ESXi Hosts and iSCSI SAN with a link-aggregation/lacp/etherchannel connection to the backbone switch, and a Link-Aggregated Connection to the thrid ESW switch via a multimode optic fibre link to a near-site backup and DR location
2. The second ESW acting as network backbone links back to the server switch and our older LinksysSRW224G4 (four SRW224G4s) switches using Aggregated Links / LACP to reduce bandwidth contention and allow for link redundancy
3. The third ESW as mentioned previously is at the backup DR location linked back to Switch 1
When using Single 1GB links between these three switches I can almost saturate the 1GB link (80-95% utilisation) as soon as link aggregation is configured by bonding 2x 1GB links together to form an etherchannel link utilisation will not exceed 100MB (network monitor graph on a server/ workstation runs flat at 10% utilisation) I have tested this multiple times useing large file transfers accross our SANs (which have high enough throughput to saturate links) and can confirm that performance degradation occurs as soon as an etherchannel is configured on the same ports (regardless of manually setting admin speed and duplex of copper ports etc) all indicators specify that ports are running at 1GB even though throughput REDUCES by 90%.
We are not running the latest firmware yet (2.0.3), however I have read the release notes for newer versions (2.1.16 and 2.1.19) and there is no indication of a fix for etherchannel/lacp performance issues.
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Dec 19, 2012
I am bridging my NetComm router to the Linksys EA4500 and it is giving me only 8MBps whereas the line speed is 14MBps. I have tried to connect directly to the netcomm by disabling the EA4500 and I am getting 14MBps. Any way to increase my speed?
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Jan 15, 2012
I have cisco sr520 adsl router. I have configured two vlans i need in vlan 2 speed only 2 Mbit/s from 6Mbit/s (full speed).
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Aug 7, 2012
We need to have one connection with less internet bandwidth assigned to it than all other other connections. Basically it is a separate conection from all others, incoming just from one switch port and separate VLAN.I know this can be done on the switch by limiting the bandwidth allocated to a port,
however, is it possible to have the speed limited down, just before it goes to the internet, ie, on the ASA, rather than doing it on the switch?The firewall is an ASA 5505.
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Nov 24, 2011
I have ASA 5520 and SSM-10 module. During copy between vlans, connected to gigabit port of asa the speed is up to 6,5 Mbyte/sec. Network cards and trunked switch are gigabit. I've temporarily disabled SSM but it didn't work. Here is my config. Also I found out, that putting SSM into bypass mode solves the problem. But I don't send any traffic to IPS. [code]
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Apr 2, 2011
Are the users' download speeds depend on the hosting company's owner's internet speed? Let say if I was running my own server with my internet speed 1mb and LAN 100mbps, are my clients' download speeds restricted to maximum 1mb of any content from my server?
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Mar 16, 2013
I am getting very slow window file transfer speed (4 Mbps per second) between two connecting servers in Cisco 6509 switch. I have connect the two laptops in 6509 switch in same module using the same vlan and try to copy the files from one laptop to another and vice versa and got the same speed on 4 to 5 Mbps per second. Switch utilization is not more than 10% and both the laptops are connected in 1 Gbps full duplex.
I have checked by removing the gateway in both laptop but the output is same.
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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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Sep 11, 2012
I have recently purchased a a Cisco SGE2000 switch and when connected to it via console cable, I was introduced to "Switch main menu" which was kind of a GUI interface. I found a way of accessing what is called a lightweight CLI (lcli).After having a few searches on google it turns out that this switch doesn't have a proper CLI. Is this possible at all? I thought that all managed switches have CLI?
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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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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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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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May 8, 2013
I have recently aquired a Cisco SGE2000 switch and the first thing I did was update to the latest firmware and change password. Now I cant login? Neither my admin / admin dosent work nor the new user I have created. Is there any characters that this dosesnt support like backslashes or forward slashes for password? If not then what can I do to get access to the switch again?
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May 2, 2013
I just want the switch to be quiet so that I can perform some network testing with only the connected hosts showing up in my traffic analysis program. But every 30 seconds or so the switch sends out an LLDP packet. This switch is only used in the lab for running tests so I know I don't need the LLDP feature running.
This article explains how to disable LLDP globally on a Catalyst switch, but I can't find any option to disable LLDP in the SGE2000's configuration menus.
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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 20, 2011
I was handed two SGE2000 24-port 10/100/1000 switches. The default IP address does not work on either of them. Short of doing a hardware reset, is there an IP discovery utility that I can run.how I can find the IP?
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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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