Cisco Switching/Routing :: SGE2010 - Slow Gigabit Throughput?
May 4, 2010
I realize this is just a small business switch, basically a rebranded Linksys, but why I'm only getting 200Mbits/s
- 48 port - 10/100/1000 , set to standalone mode
- 3 separate PCs on this switch , all are fast machines with Core 2 duo / plenty of RAM etc...
- all 3 auto-sense 1Gbps connection
I use iperf tool for bandwidth testing and no matter which PC I pick as server, which as client I get about 150 to 250Mbits/s
I am not looking for full 1000 here, but 200 seems rather sad....
- jumbo frames seem to make no difference
- I am using TCP test in iperf , standard no extra flags , 10 seconds, 20 seconds or even 30 seconds all come out the same.
- wiring is shady as some of it is just Cat5 , but when going from one laptop on the switch to another with brand new Cat6 cables I STILL only got 200.
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Apr 23, 2013
We've installed cisco devices accross our site in the last year or so and slowing getting on top of it now. How ever our old unmanaged kit seems to be out performing it. It's most like down to my misconfiguration which has lead me to here. Below is the details of hardware and configuration between devices. 3750 Core consisting of the following stacked. [code] I've got MRTG monitoring traffic and the throughput seems to max out 24m/s,
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Feb 14, 2012
When transferring traffic between two VLANs my throughput rate seems to drop to about 1.5 - 3.0 megabits / second.
My setup is like this...
Two Nexus 5020 switches. (switch01 and switch02)
Two Nexus 2232PP fabric extender switches. (switch03 and switch04)
Two Dell R815s with Chelsio and Intel NICs. (host1 and host2)
The servers run Xenserver 6.0, but as part of testing with this I've tried installing RedHat 6.2, VMware ESX 5.0 (vsphere 5).
The issue occurs when using trunking and transferring data from one VLAN to another. Example...
VM1 is in VLAN401 with an IP address of 10.100.40.40. The VM is on Host1. VM2 is in VLAN402 with an IP address of 10.100.50.50. The VM is on Host2.
I've been using a network throughput tool called iPerf to test and I find that I can only get a throughput rate of about 3.0megabits.
If I switch VM2 to be in VLAN401 with an IP address of 10.100.40.41 I get a throughput rate of about 6.7gigabits/sec.
In the above scenario, I'm using a Layer3 interface on the Nexus 5020, but in production we use a Vyatta virtual firewall.
I worked with Citrix for about 3 months and that was a dead end.
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Aug 13, 2012
I have a 500Mbps Internet Connecton with fibre and I bought an EA3500 recently. I found the LAN through put degraded by compare connected and not connected with EA3500.all connections are using CAT5e cable with all Gigabit port enabled in PC/ISP Router.
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May 28, 2012
I have a hybrid kind of network. I want to create create two VLANs on Cisco SGE2010 so that these two VLANs should not talk each other but at the same time they are able to talk Domain controllers, DHCP and other servers which are on other switches.I am able to create two separate VLANs but they stop talking with other servers(DC, DHCP, etc) which are on another switch.
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May 4, 2012
I am having some issues on my network and i think i have narrowed them down to a single switch.
On this switch the following logs can be seen
2147482407 05-May-2012 15:40:54 Informational %AAA-I-CONNECT: New http connection for user admin, source 10.0.5.135 destination 10.0.5.172 ACCEPTED
2147482431 05-May-2012 09:03:31 Warning %STP-W-PORTSTATUS: g13: STP status Forwarding
2147482432 05-May-2012 09:03:01 Informational %LINK-I-Up: g13
[code]......
All other switches are OK and do not show anything in their logs. I am trying to figure out what could be going wrong. Spanning tree is enabled on all switches. The switch tihs is happening on, ends in the ip 172 and is where all building cables connect to. They also connect to 174. I have attached an image of the infrastructure so you can visually see what i mean.
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May 16, 2012
I have 4 SGE2010P switches in L3 stacked mode in my production environment. I am having trouble routing traffice to/from my vlans. I have successfully set this up in a test environment and have compared switch settings, but still having trouble in the production environment.
Main network:
192.168.0.0/24, DG 192.168.0.1
Vlan 1 interface on switch: 192.168.0.253/24
Vlan 22 interface on switch: 192.168.22.1/24
Vlan 23 interface on switch: 192.168.23.1/24
I have assigned port 1/g14 to Vlan 23. I have enabled DHCP Relay and Option 82. I have set DHCP interface to Vlan 23. Static routes auto-genned as shown in image below. My DHCP server is on 192.168.0.16 on Vlan 1. It has a scope for 192.168.23.0/24 to give a DG of 192.168.23.1 (Vlan 23 IP address).I cannot get DHCP to give me an address from the .23 scope. So I tried to hard code an IP address into the client. When I did this, the switch sees the machine just fine, I can ping 192.168.0.253 (Vlan 1 IP address), but cannot ping any other IP on Vlan 1 (192.168.0.0/24)Do I need a static route somewhere that I am missing? I didn't need to on my test network, so I am a bit stumped.
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Oct 16, 2012
I have a setup where - I have a cisco stack (4X SGE2010 Switches) trunking over to a 3COM switch. Both switches believe to be the "ROOT" of the network. Note The 3COM is running RSTP as opposed to the Cisco Stack which is running normal STP. To my understanding of STP - Essentially STP is not functioning! Both switches believe to be the "ROOT" so they don't shut ports down. (We are currently having major issues with ports going up and down for seconds at a time on both switches)
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Mar 18, 2013
I can't connect to the console of switch cisco sge2010, I tried several console cables and none worked for me, I followed step by step manuals and nothing.
Also try the web 192.168.1.254 according to the manual but when I connect from the laptop to do ping to the switch doesnt work.
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Oct 12, 2012
Our environment consits of 4 cisco SGE2010 switches (stacked). I have implemented STP BPDUGUARD and Portfast on all client ports (suspected a loop). And our uplink to the Server DMZ recieves almost all of it's BPDU packets back(is that normal?) The issues lies where we have random ports dropping out - across all stacks for seconds at a time. We get errors/warning such as,Pinging between the DMZ network appears to be fine. Pinging from the client/switch network show packets being dropped quite frequently.All devices are on VLAN1 (I've have researched this and this could be the cause of the issue)
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Jun 26, 2012
1 Cisco switch stack (SGE2010) in L3 mode, 2 Vlans.
Vlan 1 = 192.168.0.253/24, untagged on all ports except 14/15
Vlan 2 = 192.168.22.1/24, untagged on port 14 and 15
SGE2010 default route 0.0.0.0/0 next hop 192.168.0.1 (Checkpoint UTM)
DHCP Relay enabled
DHCP server set to 192.168.0.16
DHCP interface set to Vlan2
[code]....
Expanding the ICMP entry, it appears that the destination is the pc client since it shows a Dell mac address, and the source is the Checkpoint UTM (Sofaware).
I can ping and tracert from the Checkpoint to my static IP on Vlan 2. The same goes for the DHCP server to/from Vlan2, so I am confused as to why the routing is failing. I have tried adding Port Fast to the stack ports, but nothing changes.
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Jan 7, 2011
I have two NAS drives directly connected to my router. I am accessing them through my XP laptop's wireless connection. I am trying to copy a large volume of data from one to the other (28Gb).The problem I have is throughput. I am barely getting 250Kb/s from one drive to the other.Is there a way to speed this up?
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Aug 10, 2011
I am facing a problem on a 2811 router. The CPU is remaining around 60% and the router throughput is reaching at most 18 MB while according to the data sheet the 2811 maximum throughput is 61MB. I have checked the output interpreter in order to try and figure out the cause of the high CPU and to determine if it is affecting throughput but there are not processes consuming more than 10%. I have attached the show tech-support and the show process cpu history outputs.
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May 24, 2013
I have found recently that Cisco 1905 router is having a throughput of only 10 Mb. But the router is having 2 Gig ports!.My understanding is that throughput is the data packetforwarding done by a router at a time.
What is actually mean by throughput of a router. How the router can handle 1 Gb of data from interfaces at a time?
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Nov 27, 2012
We have a problem with the throughput over etherchannel in LACP with 2 or 4 ports. It is iSCSI traffic (vmware esxi 4.1 U3) is going from 2 separate NICs (ports) to the etherchannel (with 2 or 4 ports) that has a SAN connected (Nexenta).
The SAN is configured in passive LACP and the switch is in active LACP. Actually it does not matter if we do LACP or just MODE ON, still same result: ~1GBit/s throughtput in either direction. Like already mentioned, 2 or 4 ports in the etherchannel make no difference, or the configuration of the etherchannel.
I will post some config data below, but here is the question: Why can't we see traffic beyond 1GBit/s? Source and destination are capable of doing much more than that (vmware esxi RAID 5 of 1TB SATA; SAN 16 x 1TB NL-SAS). If we look with CNA, we can see that the traffic is balanced equally over the etherchannel ports. With or without QOS or flowcontrol, no difference. This whole traffic happenes on this switch.
!
port-channel load-balance src-dst-ip
!
interface Port-channel5
[Code]....
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Mar 2, 2012
I am currently using catalyst 4506 L3 switch and 2950 L2 switches for pc's which are EOL. I am replacing L3 with 3750X, two switches in a stack. L2 is 2960S all with gbps ports. I have to have a baseline (performance comparison with the current setup and new setup) and I am using the following methods
1. Iperf throughput comparison among local vlans
2. Iperf throughput comparison with remote data centers servers.
3. Ping/ftp upload/download comparison with remote DC's. FTP file is around 3GB.
Today I have tested the above with the new setup and compared it with the old setup. For the tasks 1 & 3 I found better performance with the new setup. However the task 2 did not show any performance increase infact the throughput was much lower comparing to the old setup.
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Oct 29, 2012
I see the throughput of a ISR is 296.96 Mbps how would this compare to a 3560 if the figure is 38.7Mpps?
What would the throughput of a 3560 be in Mbps?
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Nov 14, 2011
I'm having a throughput problem with a new ASA 5540 running version 8.2 (1). When trying to access a database server using tcp port 1521 (sqlnet) it is about 10 to 20 times slower than when the database is not behind the firewall. We've been running the same software on a database behind an ASA 5520 running version 8.0 (3) with no problems for years. When I check the cpu usage on the 5540 at the ASDM home page, it is rarely above 20% and never above 30% while this is being tested. I tried testing ftp throughput over the same interface and it was normal with ~320 Mbps average rate transferring a 500 MB file.
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Jul 17, 2012
I recently setup our small office network using the following setup:
Cablemodem <--> router <--> 1231AP(role root bridge with wireless clients) <-> 1231AP(role non-root bridge with wireless clients)Code on both APs: 12.3(8)JEE.Office network generally has less than 3 wireless clients connected at any one time to either AP. AP's are a mere 50' apart; clients are all less than 30' from either AP; they all show excellent signal and connected at 54mbps signaling rates.
All is/has been working very well & very stable with the exception of speed. We have business class service from RR, approx 25mbps dl, 2mbps ul. Any hardwired client to the router switch ports are able to download at speeds averaging 23mbps. Any wireless client connected to either AP is never able to exceed download speeds of 5mbps. With no other wireless clients connected except my one test client, I was not able to exceed 5mbps throughput from either AP that I connected to.
I can confirm that the ethernet connection between the router and root bridge is up at 100mbps-FD and not showing any errors: [code]
Are these very slow thoughput speeds normal of this hardware combination?I did much searching/googling and found claims that by eliminating TKIP it almost doubles the actual wireless speeds our clients can obtain.
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Jan 8, 2013
I am experiencing slow throughput on a L2L IPsec tunnel that we have between one of our offices on the west coast (WC) US and another on the east coast (EC) US. The tunnel endpoint on the WC resides on a 5510 and a 5545x on the EC. The DIA circuit speed on the WC is 45 Mbps and 200 Mbps on the EC. The throughput of this IPsec tunnel is maxing out at approx. 4 – 5 Mbps. The utilization of the DIA circuits at both offices is under 5% when running various FTP test transfers. Both devices have low memory and CPU utilization.
We have a 2nd office on the EC (45 Mbps DIA) which I built a tunnel on a 5510 with the WC office and it is experiencing the same slow throughput. In covering all my bases we have a colocation facility on the WC and in building a tunnel between the 2 WC offices I WAS seeing close to full line rate speeds over the tunnel. Additionally, I built a tunnel between the 2 EC offices and I saw full line rate speeds. With the physical distance between the WC & EC offices I would expect some loss in throughput speeds but I would not expect it to drop as low as 4 – 5 Mbps. In thinking something may be up with the 5510 in our WC office we shipped a 5505 to the WC office and we built the same IPsec tunnels on it and it is experiencing the same.
In working with our support vendor to try and solve the WC <-> EC throughput issue they had me change the MTU, TCP mss, DF-bit, types of encryption/hash on the IPsec tunnel but nothing has resolved it. We are not showing fragmentation or PMTU issues on the tunnel. In contacting the ISP of our WC office they mentioned that they do not have any type or rate limiting in place. Our WC ISP had a CCIE review our configurations but nothing was found.
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Oct 8, 2012
Does anybody know the Maximum Throuput of a Csico 4948 using its Layer 3 capability? Is it 72mpps for Cisco 4948 and 102 mpps for Cisco 4948 10 Gigabitethernet?
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Feb 13, 2012
I like to know what is throughput of the Cisco 2911, cisco 2921 & cisco 2951 routers. I can see ISRG2 can supports the throughput of 150Mbps.
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Jan 26, 2012
I'll have to replace an old WS-C3550-24. Reasons for this: EOL/EOS & we'll need a NAT capable device...
As I understood, the only L3 catalyst that is able to perform NAT is a 6500? Is that correct? If the above is correct, it seems I can only replace the setup by using a router/ASA with a L2 switch. A router with high throughput (+/- 300Mbps) is hard to find, especially as NAT will require CPU resources...
So, my best (affordable price) solution is getting an ASA5520 (450Mbps FW throughput) and a L2 switch?
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Dec 12, 2012
What is the c1811 isr max throughput when not running ipsec site vpn.
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May 21, 2013
I'm trying to identify a Cisco router that will give 300+Mbps through a 1Gb WAN port. I think the 1921 can get up to around 300Mbps with the on board RJ45 ports, but are there any other/better suitable models?
There's no need for any other particular functionality or feature set, the routers aren't doing anything fancy or unusual - it's the achieved throughput that's important.
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Mar 21, 2012
We are experiencing output drops on our 3750G-12S (IOS 12.2.55).
I have monitored throughput with MRTG, but it doesn't seem that high compared to that the 3750G is supposed to handle 17.8 Mpps.
The 3750G's are stacked, running ospf, qos, multicast (IPTV) and etherchannel.Is the maximum throughput reduced by stacking or any of the other features?
I don't know if one can estimate what the maximum throughput is per ASIC or per port, but on one of the ASICs that is having drops the peak unicast load is 1.3 Mpps and multicast Mpps is 0.9 Mpps. Total ~2.2 Mpps.
This doesn't seem high at all and I don't understand why the drops are appearing. What I can do to find out the reason for these drops?
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May 30, 2012
How i can view the capacity throughput (backplane) of core switches (6509)? How i know much is in use?
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Oct 26, 2011
We have a number of 3845 routers, some running IOS 12.4(22)T2 and earlier and some running 12.4(24)T4. On the ones with 12.4(22)T2 and earlier, gigabit interface g0/1 shows interface down/line protocol down when there is no cable connected to the interface and the interface is not in shutdown state. On the ones with 12.4(24)T4, gigabit interface g0/1 shows interface up/line protocol down when there is no cable connected to the interface and the interface is not in shutdown state. Interestingly in both cases, the "show controller g0/1" command shows " network link is down (NO CARRIER)" when there is no cable attached. It makes sense to us that the interface status would be down/down when there is no cable attached. It does not makes sense to us that the interace would be up/down. Did Cisco at some point change their philosophy on whether an interface should show down/down or up/down when there is no cable attached, or is this a bug?
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Aug 14, 2012
I've just upgraded to FIOS quantum service. (50 MB down, 25 up). I have a Linksys 2500 connected to the FIOS router. The FIOS (ActionTec) router provides the full advertised speeds with any speed test service I try. But with the 2500 connected to the FIOS router I get download speeds about 3MB. The MTU on the linksys is 1500. It's connected correctly and is running it's own DHCP server. (Why am I doing this? I try to avoid the ActionTec routers, they have broken many services in the past.)The 2500 firmware is up to date. I've tested on the wireless and wired (ethernet) interfaces.
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Jan 11, 2013
New Dell XPS 8500 connected to Gigabit port on BT Home Hub 3.Connection shows 1Gbps. Accessing web sites is very slow.connect to 10/100 port and web access is fine.Old Dell Vostro 220 connected at 1Gbps and worked fine !
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Apr 18, 2012
I am trying to test the gigabit ports on a Cisco 2950 switch. 1000Base-SX. I have the internet or dhcp server connected to port 24 on the first switch and my pc hooked up to the (any) port on the second switch. Both switchs are connected with a fiberoptic cable with MTRJ connectors on either side.
Now when I use gi0/2 on both switchs all works fine. I get a dhcp address from the router on the other end of the first switch. but when ever I include gi0/1 on either end of the fiber optic cable neither of the ports will initialize (neither of the leds above the ports light up). I have deleted all the config files before booting up the switchs so they should have a default blank configuration.
When looking at the Http web page for the switch I dont see any issues with the port. what can I do to make sure these ports are working or can be configured?
I will not be able to post back any more information about the switch until next tuesday. Im off till then.
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Apr 7, 2013
im currenly configuring a 4500X with 16 port. All sfp are 1Gig, but when I input show ip int brief, it shows that the interfaces are on 10 Gig. Does Catalyst 4500X already support the 1Gig SFP without inputting a command or do I have to configure it to activate the 1Gig interface?
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Jun 4, 2012
Are all ports on Catalyst 4500X Gigabit/10-Gigabit or just the ports on 8-port module. We are looking at 4500X for campus distribution layer but need Gig ports to access switches for now and may year from now will be using 10G.
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