Cisco :: Low Performance When Connecting Switch To Port 5?
Jun 14, 2012
I'm new here but I'm not really new to networking. I manage small network but I just found out that I have some issues regards to speed.So what's the problemAs a main router/fw we have Fortigate 100A which then goes to a core switch SRW2016.This switch then handles two VLANS.The problem is that I have ports 5 assigned to VLAN 100 and port 6 to VLAN 101. They relate to DMZ1 (VLAN100) or internal (VLAN101).When I connect small unmanageable switch to port 5 I get very low performance (20kB/s internet, 2-3MB/s LAN) however when I plug in PC directly, I'm getting full speed.Port 6 with VLAN101 has the same unamangeable switch but no issues.Obviously you're thinking it's the switch - well I've tried replacing it allready. It's not the switch.Both ports have the same configuration (relating to their VLAN) but resolving it goes beyond my knowledge
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Jun 15, 2011
We have recently purchased some Cisco 3750x switches and we are getting complaints from users that the performance is poor when both the PC's NIC and switch port are fixed at 100/Full?
There are no errors or collisions on the switch interfaces so there is no obvious problem on the switch. The PC's are standard DELL Optiplex 755/760's
or gx 520's.
Any performance issues when configuring the switchport to 100/FULL?
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Feb 26, 2012
I was looking for a way to connect an AUX port from a 1700 router to a 6500 switch module console port, to see the output of the Switch's on the 1700 router, in case there is a network downtime, I could see what's going on in the switch, what cable should I use ? Also, is there is any kind of documentation for this type of config what have I seen is very few info.
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Apr 11, 2012
I'm trying to connect my router SR520 internal Ethernet port to my ESW520 24 port switch. When I physically connect the cable the port on the switch suddenly drops.
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Feb 19, 2012
In one location we have a HP 2510-48 port switch which we need to connect to a Cisco 3560 switch. The problem I have is that we have issues connecting fibre to the HP switch, so I have decided to attached a CAT 5 to Fibre convertor at this end and another to the cisco switch.
My question you can not connect a HP switch to a Cisco switch, is this true or do I just need to confirgure something on the ports.
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Jun 14, 2012
What is the Cisco 1921 router performance if connected with 2 Giga Ethernet port? What is the performance if enable GRE tunnel ?
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Jan 1, 2013
I have 2 RV042 routers with identical firmware (1.3.13.02-tm) and settings. One router is a backup that sits in a box, but both experience this problem. The WAN port gives very poor performance most of the time. Download speeds range from normal, 25mb, to less than .5mb. Pings from my command prompt or the routers "Diagnostic" page, even to the cable modem, are almost always above 500ms. However, pings to internal resources are fast, usually under 5ms. If I connect my laptop directly to the cable modem I have no speed issues. The problem occurs whether I use WAN1 or WAN2.
If I restart the router, speeds are fine for a few seconds and then it begins to slow down like someone is turning down a dial. We also regularly experience a complete internet disconnect quite often, and when it happens, the ping results are the same when it comes back up, almost like the router is restarting itself. [code]
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Apr 23, 2012
I have a WS-C3560G-24PS service as a distribution switch with six (6) WS-C2950T-24 connected to it. In looking at the utilization on the inter connect links no one is running close to a gig speed and this includes the link between this switch and the core. The CPU load (6%) and memory utilization (30%) on the switch do not seem bad so what else does one watch to see if it needs an upgrade?
We are starting tohave discussions about any needed upgrades on the network. I have an ocassional user that complaines about low performance but looking through the network I can find nothing glaring on a consistent basis that says an upgrade is warranted. I am however looking at things such as the above. Utilization on links, CPU, memory, etc.
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Apr 25, 2013
I am on a call right now troubleshooting some latency issue. The CPU usage on the sup card is low. Don't see any drops or input errors. I am aware that the switch and its modules have capability limits. Is there command I can run which will tell me if any module is overloaded or if the fabric/backplane is over utilized?My chassis is WS-C6513 and sup card is WS-SUP720-3B.
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May 8, 2012
On the supervisor card of a cisco 6500 series, according to the following link, [URL] it only has 2 uplink ports on the card. Would I be correct in assuming that I only have those to ports that I can configure IP addresses on?
The cisco that is being devlivere is coming with a 48 port switch and 24 port fibre switch. Could I change any of those ports into a router port and configure IP addresses on those?
The supervisor card is a ws-sup-720-3b the 48 port switch is a ws-x6748-ge-tx the 24 port fibre switch is ws-x6724-sfp
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Jun 5, 2013
I'm fairly new to Cisco products am in the process of developing my network knowledge on a deeper level. I have a 3825 with a HWIC-4ESW and I'm struggling to fully understand how the two "see" each other. I've setup a V LAN with a layer 3 address on the HWIC and added the switch ports to it. This seemed to allow devices connected to the switch ports to talk to the built-in router ports. I thought this was all making sense until i applied an access-list to the router port. It's a simple ACL i'm just using for testing and the only thing it does is blocks telnet from anywhere. I know the ACL is setup properly because if I connect a device directly to the router port i cannot telnet to the port. However, if i connect a device to one of the switch ports, i am able to telnet to the router port successfully.
It seems that I'm missing something with how traffic flows from the switch port to the router ports and how the two "see" each other.
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Dec 28, 2008
what is the use of no switch port command in L3 switch?
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Jan 16, 2011
is it possible to assign a loopback address to a typical switch port on a 2950 switch? I want to be able to have some devices connected to a switch to test access lists and VLANs.
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Mar 31, 2012
I have 1 Cisco switch 24 ports and 12 computers. The 12 computers are divided in three groups and every group is a different network segment.
question 1: I need that every group has communication with its own set of computers but no communication with the computers on the other segments.If I connect the computers to any port on the switch, can they communicate within its own groups? Can the switch pass the network traffic for all of them?
question 2; What I need to do on the switch to have them to reach the internet?
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Aug 3, 2012
my computer doesn't have a COM port, so i connected an EthernetCOM cable to my laptop (ehternet end) and COM to the switch. Question now is, how can i establish connection?
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Mar 10, 2011
Here is a second paragraph from official BCMSN book page 93:
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Jan 10, 2013
Im looking to connect up 4 new pcs to network but I don't have enough wall ports. I thought I could plug cisco 2950 switch into the port on the wall and act like a hub. The switch configuration is default and there is only one vlan. How is it that it won't connect. Does it need a crossover cable.
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Jul 19, 2011
there are more than 15 servers which include xen,esx,vmware,also san etc..which are connected to L3 core switch directly. And vlans are created for each.....xen,iscsi,vmware,xen,server. wanted to know is there any other technology other than directly connecting servers to core switch and assigning vlans that can be used in place?
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Mar 7, 2011
I have switch.Broadband connection i want to share it among all 5PCs.By ising ICS and switch can do it??
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Oct 25, 2012
The network card in my PC supports 1Gbit ethernet, my 2TB NAS also supports 1Gbit ethernet, however both of these are currently run through a 100Mbit cable modem/router thus reducing the connection speed. I was wondering if I purchased a 1Gbit switch and connected all my devices directly into that, then connected it into the cable modem, would the PC communicate with the NAS directly via the switch or would it go through the cable modem?
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Feb 10, 2013
Well, a while back, I posted about getting a Network Peripherals KeyStone24MG, and now I have a 9-pin RS-232 cable to connect via console. Now what do I do? I connect with hyperterminal on COM-1, and it only shows a white screen :/
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Mar 25, 2011
I am still not able to get internet access through my network switch. Where I want to have the switch, I have a TV (with LAN port), PS3, a network capable hard drive, and a iMac. I want to be able to connect the switch to the ethernet jack on the wall and then connect the components to the switch. So here is a map of what I want to do:Actiontech Router (FIOS standard) ---> LAN port on the wall ----->D-Link DGS-1005G switch---->PS3,hard drive, iMac, TV.When I try this setup, everything looks fine, but I do not have internet access. When I connect directly to the wall jack, I always get internet connection. I have tried two different switches, but still no avail.I have tried assigning static IPs to each of the systems, but have had no luck in getting them to connect. The LAN jack is wired directly into the actiontech router. The range on the router is 192.168.1.10-192.168.1.256 (192.168.1.2 is a dd-wrt range extender).
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Jul 21, 2011
pxe server ip address is 10.10.10.20 which is connected to switch port fa0/9 and client is connected to switchport fa0/7.i have only 3 devices altogether. below is running config of switch. wen i boot the client from the server, it display error message as: "proxy dhcp were offered. none dhcp were received. exiting broadcom pxe."
Switch#sh run
Building configuration...
Current configuration : 2710 bytes
!
version 12.1
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption[code].....
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Apr 12, 2011
I have a 3560 series switch and two comcast cable modems. I connected the modems to them switch via cross over cables and set an OSPF routing on their subnets. I connected my wireless router to another port of the switch and set its gateway IP on the switch port. I can ping the modem with the switch and I can ping the wireless too. But I cannot access to the Internet via the wireless router.
I need load balancing on two cable modems and get a single network connection via the wireless router.
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Feb 9, 2012
I want to buy a WRVS4400N, but I need to know something before.
The router will serve as an access point for 10 wireless station, 6 of them will run over Terminal server, the router will also serve 20 computer for the internet, so I want to Link aggregate the four LAN port to my swtich, I know how to do it on my Dell Powerconnect, but I want to know if the WRVS4400N will support it, there will be a lot of traffic going through the router so linking the 4 port in LAG mode to my Powerconnect swicth will speed up the communication !
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Feb 19, 2012
Are there any solution to connect VLAN 1002 configured in non-cisco switch to connect to Catalyst 6509?
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Aug 22, 2011
I have a Cisco 2811 router with C288nm-advsecuruityk9-mz.151-4-4.M.bin IOS version.The router has two LAN interface FE 0/0 and FE 0/1.The router have too, two interfaces ADSL ATM0.0.0 and ATM 0.0.1, both are connect to internet..I need the next configuration.The interface FE 0/0 is directly connect to a Switch A.The interface FE 0/1 is directly connect to a Access Point Cisco.The Access Point and the Switch is not connecting between.The subnet of Switch A and AP are different (Switch A 192.168.180.0/24 and AP 192.168.181.0/24)The devices in the switch A have dynamic IP address, the router must be a DHCP pool to assign theses IP.The device in the AP have dynamic IP address, the router must be a DHCP pool to assign theses IP.I created two DHCP pools in the router, one for the subnet 192.168.180.0 and other for 192.168.181.0, but the devices of FE 0/0 assign IP of 192.168.180.0 or 192.168.181. 0, but not only in the 192.168.180.0.
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Aug 15, 2012
I connected my 2504 wlc with my 3750-x switch using port-channel. Later i came to know that LAG mode is not supported in 2500 series , so i removed port-channel from my core switch and connected all the 4 port in WLC to core without any port-channel. Is that recommended?
one more thing is , from WLC i can ping tha management interface on my core. but i cannot ping the default-gateway of my dynamically created interface on my WLC to core(core is the defauly gateway for all).
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Jun 5, 2012
Is it mandatory to connect Cisco WLC 2504 to a Gigabit port ?? can we connect it to a fasternet port (100 mbps) ?
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Jan 20, 2012
I am currently accessing the internet on my home lan with a Linksys wrt54g dd-wrt in bridged client mode (small town wifi to T1 network) with a static IP, but plan to add an additional WildBlue 12mbps satellite connection. What I’d like to do is load share between the two connections with a RV042 dual wan router…. The satellite modem connection to one of the WAN ports and configuring the RV042 as my DHCP server is not a problem, but how I should configure my wrt54g to the dual wan router for load sharing?I suspect a IT professional might understand this intuitively, but I am unsure how to pass through my public address from the Linksys to the RV042 WAN port.
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Nov 20, 2011
A Layer 2 switch with IP Address 192.168.1.4 (Vlan0), subnet 255.255.255.0 is physically connected to ADSL Router with IP address 192.168.1.1 (which is also the gateway address for the switch). The problem I have is that all the devices connected to the switch can intercommunicate but are unable to communicate with devices connected to the Router. I guess this may be something to do with how the Vlan is configured on ADSL router?
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Jan 13, 2012
I connected a switch and the device is not even recognized in my router site.
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Oct 11, 2011
I have two public IP's entering a location from two different sources. One is under our control and the other is a 3rd party. Lets say Ours: 1.2.3.1 3rd Party 1.2.3.2
One is coming in through a firewall/router and the other is a direct link. Each will come into a different network segment 192.168.200.0/24 and 192.168.210.0/24
some of the hosts one subnet will need to talk to the other.
My envisioned setup would be as follows.
1.2.3.1 will come in to the firewall/router into the managed switch. 1.2.3.2 will come in the the same switch but in a vlan The vlan will have a trunked port to the firewall/router to allow routing between the vlan (192.168.210.0) and the other subnet (192.168.200.0).
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