Cisco Switching/Routing :: 3650 - Speed Negotiation In Interface Gigabit
May 18, 2013
I have a question about speed negotiation process between interfaces. I have 3650X Sw and 2960S-48port. All ports of two are GigabitEthernet, however the link between them is only 100Mb/s, Full duplex. I try to set the speed 1000 Mb/s manually in the interface then the interface never up. Its status is down/down. I must set back to speed auto. I show interface Gigabit0/24 in Sw 3650-X and figure out that there are many output drop (over 600000). I clear counter then after two days the output drop is over 70000. This link is trunk link between two switches, all ports of access SW are Gigabit and connect to PC. First, I thinks the 3650X is throttled somewhere in output direction of trunk link. But there is another trunk link (Gi0/23) to another 2960S-48port and no output drop number in this interface. This Giga 0/23 speed is 1000 Mb/s (auto speed, auto duplex)
Does any outside things impact the speed negotiation process between 2 interfaces? And output drop number may caused by abnormal speed between two Gigabit interface?
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Mar 14, 2012
According to Cisco's site the WS-X6748-GE-TX is a "10/100/1000" module.URL
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Oct 17, 2012
confirm if "negotiation auto" is supported gigabit port for C3925E router.
Router(config-if)#Interface gi0/2
Router(config-if)#description test link
Router(config-if)# no ip address
Router(config-if)# negotiation auto
^
% Invalid input detected at '^' marker.
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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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Jul 31, 2011
i'd like to force the speed/duplex of the integrated Gigabit interface on a LAP1042N, managed by a 4402 running software version 7.0.98 but I cannot find the command either by command line or on the GUI.
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Sep 14, 2012
I am trying to configure a loop back interface like so: [URL], on the following device:
C3550 Software (C3550-IPSERVICESK9-M), Version 12.2(50)SE, RELEASE SOFTWARE (fc1on port gig0/1 which is using a 1000Base-SX adapter. This is for troubleshooting purposes and it does not appear to be a feasible option. Is there another way to accomplish in the IOS?
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Jun 11, 2012
We are facing to an annoying issue. We have a 6509 running in Catos 8.3(4) with WS-X6548-GE-TX, WS-X6348-RJ-45 and WS-X6148-RJ-45. When we configure the mode in auto negotiation, it comes up in half duplex. We need to configure the speed mode at 100Mbit/Full to make it work. But if the chassis or port restarts (not the server), the link becomes half duplex. This happens only on module in Gigabyte like WS-X6548-GE-TX.
Cable have been replaced but does not work. It is not happened on another chassis running on IOS 12.2(18)SXF17b with WS-X6548-GE-TX.
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Mar 14, 2013
I have created a PBR in 3650 switch to route traffic from a specific IP address to a specific next hop or IP address(Router)
ROM: Bootstrap program is C3560 boot loader
BOOTLDR: C3560 Boot Loader (C3560-HBOOT-M) Version 12.2(44)SE5, RELEASE SOFTWARE (fc1)
SW1 uptime is 6 weeks, 2 days, 16 minutes
System returned to ROM by power-on
[Code]....
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Jul 28, 2012
Nexus 5500 support auto negotiation on 1gig sfp port? There is an end device that only support auto negotiation and cannot be manually set speed/duplex.
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Mar 11, 2012
We have a 3750 and a 3560 defined as a layer 2 switches. One gig port on each switch is trunked to layer 3 switches, which containall the VLAN definitions etc. The other gig port on the 3650 and 3750 switches are trunked together to provide an alternative path in the event of a failure.
We have added a new device to the 3750 and given it a VLAN 9, and the VLAN added to allowable VLANS on both trunk ports between the layer 3 and layer 2 devices ie:
switch port trunk allowed vlan 9,10,20,30,40,50,60,90,200,202,206,211,212,700.
From either of the 3750 or the 3560 we can ping any device on any VLAN on any switch in this group with exception ofVLAN 9. We can however ping the ip address of VLAN 9 on the layer three switches.
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Sep 19, 2012
I am facing port speed issue on WS-C2960G-48TC-L series switch.This switch gig0/X ports connected to onother switches (Cisco and HP both switches are also gigbit ports and directly connected ).but interface is giving only 100mb/s output.ios on WS-C2960G-48TC-L is 12.2(44)SE6
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Sep 26, 2012
I have an Ethernet Loopback Plug (4 Pairs) made and trying to test the Gigabit Interface on a 3845 Router with a fail result. The interface will show up/up only if I set the interface to 100M/Full Duplex when I plug-in the Ethernet Loopback Plug (4 Pairs). I don't see this Gigabit Interface @ 3845 router has any option to set it to internal or external loopback.
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Sep 16, 2012
I have a small network using a 24 port 3750 switch. I need to add five computers in another room and only have one Cat 6 cable running there and no room left on the 3750. I got a 3650 to put in the new room with the new computers. The problem is, whenever I plug the new switch into the 3750, it shuts down the port and gives me an err-disable. I can do a shut/no shut and re-enable the port. I searched the web and read about trunking and clusters. I'm not sure which, if either, is appropriate. I see various documentation that shows you can put one switch behind the other. But nothing tells me the configuration which will allow it.
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Aug 3, 2011
Configuring a network with Rapid Spanning Tree Protocol. There's a combination of Cisco 3650s, 2950 and 2960 switches. It is a flat Layer 2 network with a single VLAN. CLI configuration?
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Nov 22, 2011
Does 3650-X IP Base support Static Load Balancing or i should upgrade to ip service SW ?
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Dec 22, 2012
I have set up a scenario for a small business and have some questions about how to manage the access between the VLANs. Is there is a better / another way to do it. See the attached picture for the topology / info.
My question is:
My switches is set up with x numbers of VLANs and a routed port (no switch port) to the ASA for internet connectivity. How is the best (or only??) way to manage the access between the VLANs? Is it ACL's on the switch?
And by "managing access" I mean VLAN 50 (public WiFi) only have access to the internet, only management servers have access to management VLAN, Client VLAN only have RDP access to server VLAN and so on. Is there any way to do this in the ASA (or add another (gigabit) router to the topology)) or it the only way to have lots of ACL's on the switch itself? I have thought about "router on a stick", but then I imagine there will be a bottleneck between the switch and the ASA?
(Equipment is 2 x 3650G, ASA5505, AP1252 - see attached file).
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May 22, 2013
|_voip PBX___|-----|__3650___|------fiber-------------|__3650_____|------|_voipphone__| I have a case where voipphone is registered on the voippbx but peaple on both end can't hear each other . No ACL on both 3650 , no firewalls between them , distance is about 2 miles . I tried to make telnet x.x.x.x 1720 or 1719 or 1721 (h323 ports) to opposite switch -connection refused . How can test if ports are open on the 3650 ? Is it coorect If I create allowing acl and apply it on both 3650 on the interfaces connected one switch to voippbx "IN" , second switch on the interf connected to voipphone "IN" ?
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Sep 20, 2012
I have a question regarding fabric storage and cisco catalyst switch 3650.My plan is connecta a esxi server to a nexus switch and then to a san storage. I want add a new switch to have a redundant link between esxi and the storage.Can I use a cisco catalyst 3650 with a fiber conecction to connect the HBA esxi server card to 3650 sw and the SAN storage to the 3650 sw ?
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Jan 12, 2013
What s the fabric speed (backplane speed) of a Nexus 2232 10G EX?What is the forwarding rate (Mpps) of the same 2232 FEX?
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Jan 8, 2011
I've got a Buffalo LS-WXL5BF connected directly to one of my PC's gigabit ethernet ports. The link in the Win7 network and connections is showing it connected at 1Gbit but the actual transfer speed tops out around 150-200 Mbit or roughly 15-25MB/s (which is well under what the unit is advertised to perform at.)
I'll be swapping out the cable that came with it for a good CAT5E I got from monoprice but other than that I'm not sure what to try.
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May 1, 2012
I have a Cisco ASA 5505 and I have my internal and external interfaces configured but I currently cannot ping from the inside to an IP Address on the outside. I had this setup and working and I have another set of equirement that I am replacing that is working with my service provider so I know it is a configuration issue. When I ping 4.2.2.2 for example I get:
Destination host unreachable
Do I need to add a static route from my inside interface to my outside interfaces?
: Saved
:
ASA Version 8.2(5)
!
hostname pxasa
[Code].....
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Feb 25, 2012
to what extent gigabit lan port affect speed of internet?
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May 21, 2011
I have a desktop and a laptop computer. both equipped with Gigabit Lan port... I connect them with Straight cable by assigning both computers IP address. I havnt use any switch or router between computers.... The problem is that my transfer speed is about= ~10MB/s..... As far i know the transfer speed should be around 70-80MB/s (125MB/s for Gigabit Lan).....
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May 25, 2013
My laptop will not connect at full speed whilst on a wired connection. All my other laptops connect at full gigabit speed OK using the same cable. My XPS will only connect at 100Mbps.I have the Realtek PCIe GBE Family Controller.
I am using Win 7 64Bit but I have also tried Ubuntu 12 with the same result. Is this a known problem ?I think this may have been like this since new, My most expensive laptop is the slowest on my network.
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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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Aug 23, 2012
Documentation discusses "1-Gigabit Operation", where all 4 1-Gig SFP's on Sup7L-E are enabled. But it does not say __how__ to select either 10-G or 1-G operational modes.
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Jun 4, 2013
I have a 3550 switch right now, and need to upgrade to a gigabit switch, so I'm looking at a 3560G-48. For some reason I purchased an EMI version of my 3550, but run the ipbase image...what I need to look for - is a 3560G-48-s good for what I need?
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Mar 12, 2012
Brand new 2960. When I plug a cable into the port, nothing happens. The port light doesn't begin negotiation or anything, it just stays dark. The cable works fine--I have it on another switchport with a crossover connector connecting to a little Cisco SOHO switch without problems.
I've done the following:
switchport
switchport mode trunk
switchport trunk allowed vlan 1
no shutdown
In other words, I've fiddled with it. But I don't know why it doesn't light up..
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May 1, 2013
I have two switches, WS-3750-24PS-S connected in two cabs via fiber. Patch panels at both ends with patch leads. Used tester to confirm end to end fiber connectivity. When plugged in, one switch lights up the other does nothing.
Ports are as follows:
interface GigabitEthernet1/0/2
switchport trunk encapsulation dot1q
switchport mode trunk
same at both ends. Tried both GI ports same result. swapped transceivers over and the same result, (one switch lit one not - the same switch in both cases). put both transceiver in each switch, (gi0/1-0/2 in a single switch). on the one that lights up in the original scenario we get link on both ports and they come up, on the other nothing happens. shut down both ports on the malfunctioning switch and no shut them, no change.
Show transceivers doesn't show transceivers on the malfunctioning switch, and no attempt is made to bring the ports up if the fiber is removed and replaced.
it is almost as though the two gb ports are kaput. Anything else I can try?
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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 9, 2006
How does the 3550 with enhanced image compare to the 3650 with enhanced image in terms of routing functionality?
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