We have the 3750G with the IOS version 12.2(35)SE5. Does this IOS version and switch support the TCP Window Scaling detailed in this doc? The doc says Release 12.2(8)T. And I don't see the 3750G or the 2960G platforms listed in the doc.
[URL]
I am facing strange behavior in Windows 7 and Windows Vista.I have a client program in my PC and server program outside network.I can see that some time TCP WINDOWS SCALING working and some time not.In first Log after 3 way handshakes established I can see data transfer happening bocs from log I can see it is settings SCALING factor.
But for some cases where I see that connection happened but data transfer not happening (May be my network does not work without Scaling..) I can see my WINSOWS TCP stack has not set SCALING in SYN request.Hence in 2 nd log I can see "Scale factor not supported"...though I enabled SCALING in my WINDOW .
You can see in 2nd log :: [ Win=8192 ( ) = 8192 ] - not settings scaling factor some time.How to fix this issue so that Windows 7 / Vista always set SCALING in SYN request.
My TCP Settings :::
Receive-Side Scaling State : enabled
Chimney Offload State : automatic
NetDMA State : enabled[code].....
I have 3 2960g switches that each have about 40 devices (pc's, printers, etc..) attached to them. Each of these 2960 switches has one port connected to a port on a "core" switch, which is a 3950g. The 3950 has 3 switches and all of our servers (12) conected to it's ports. The network seems to be running alright, however most, if not all, of the port lights on ALL switches blink wildly(at least I consider it "wildly"). Am I doing this wrong? Is there a better way to connect all these switches?Also, this configuration is for our first floor. The second floor has the exact same configuration, and the two 3950's (one upstairs, one downstairs) arec connected via fiber.
View 2 Replies View RelatedI have used all the ports on my 24 port 2960G and need to extend it with another 2960G. These switches do not have trunk ports so what is the best way to stack them and have all 5 vlans on both switches.Can I just use a port Channel trunk etherchannel ?
View 7 Replies View RelatedTrying to connect 2 switches together (both 2960G 8 ports). I have an SFP in each (GLC-LH-SM). They are connecting over SingleMode Fibre using the correct cabling. The fibre cores have been tested and are all ok also.
I can't get no Layer 1 connectivitiy at all. Just dead. I have tried 4 different GBICS, swapped cabled etc.. I have forced the media type to use SFP. No link light....
I thought it would just be a case of plugging in the gbics cables and off I go! I read about forcing the speed and duplex on the port but because the port if SFP, the speed and duplex settings are not available. This seems to be hard coded.
I installed windows XP and now I connect a cable from the router to the pc and I can't connect to the network.
View 1 Replies View RelatedI am currently tasked with setting up a network, pretty much from scratch, that requires some fairly hefty VLAN deployment. My hardware on hand (already existed so can't can't change anything easily) 5x ESW-540-48 Switches, 1x3750g switch, 1x2811 router. I don't believe the router should be required as the 3750 is capable of intervlan routing. [code]
Now at one point I actually had the VLAN's *working* in that I could specify an IP address and could ping to and from it! However DHCP wasn't passing despite numerous attempts with DHCP relay and IP-Helper configurations.Also I was having issues with VLAN 1 as the native VLAN, the ESW switches don't allow you to do much with them, as they 'weren't created by the user'. So tried switching that out to VLAN11 also but with very little success there (I had to change the native vlan on all trunks to VLAN 11)All the 10.x.x.x addresses need to be able to communicate with each other.All the ESW switches need to be able to handle their respective VLAN's as well as VLAN 1 (for Printers and wireless access points distributed around the building).
I have 7 POE switches that have ESI IP phones attached. I have two VLANS, 1 and 2. VLAN 2 is used for voice and is defined in each switch.The ESI IP phones connect to my POE switch ports and the pc attaches through the ESI IP phone.
I have had voice quality issue between floors in my building. Talking to others on my floor via the IP phone, there are no voice quality issues. [code]
We have to connect two 3750G switches to some HP machines. Those machines have several network interfaces, which are going to be configured in several bondings. The load balancing mode they want to configure is mode 6, alb. We have investigated and it is: [code] Receive load balancing is achieved through ARP negotiation.We would like to know if it is supported to be connected to a 3750G an if an special configuration is needed.
View 1 Replies View RelatedHas any come across show ver memory details on 3750G-48PS as below, One of our Catalyst 3750G running software 12.2(44)SE2 shows unexpected DRAM as below:
cisco WS-C3750G-48PS (PowerPC405) processor (revision F0) with 0K/12280K bytes of memory. This would equate to around 11MB memory which does not seem right... Is it a known IOS bug?
I have issue with connectivity 3750G with Dlink Switch, it cannot connect to non-cisco switch with fiber , But CISCO to CISCO switch it shows connectivity. My question is that is there any configuration on Cisco 3750G switch to connect with non-cisco switch through fiber (SFP) ?
View 2 Replies View RelatedI have faced a problem with configuring Cisco 3750G series switches as Sever farm switches with redudance.
servers have 2NIC (1GBps) and both are bridged for redundant connections.In both switches all ports get green coluor except one port on Secondary SW. I saw some Spanning tree block port status on that switch.when i type Show cdp neghbor command on switch i can see other switch through a server connected port. Also Spannig tree root bridge election is occured through that port . Simply i need to configure both switches to pass traffic through there uplinks them selves.. but it seems like Secondry switch pass its traffic through primary switch ( i think according to STP ) usinginterconnection of bridge port of a server. [code]
We have a stack of 4 Cisco WS-3750G-24TS with Sw Version 12.2(52) SE and giving weird errors:-
-Traceback= 17211C8 16FA4C0 16FA4FC 18625E4 18608D4 286A850 283E6FC 282EDF4 2859BBC 1B2EDA8 1B25878
Oct 17 22:26:48 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.7
Oct 17 22:26:50 AEDT: %SYS-3-CPUHOG: Task is running for (2098)msecs, more than (2000)msecs (8/6),process = SNMP ENGINE.
-Traceback= 172108C 17211CC 16FA4C0 16FA4FC 18625E4 18608D4 286A850 283E6FC 282EDF4 2859BBC 1B2EDA8 1B25878
Oct 17 22:26:51 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.7
Oct 17 22:26:53 AEDT: %SNMP-3-CPUHOG: Processing GetBulk of lldpRemEntry.6
Oct 17 22:26:53 AEDT: %SYS-3-CPUHOG: Task is running for (2097)msecs, more than (2000)msecs (1/1),process = SNMP ENGINE.
What are these errors is this a bug in the IOS
We have a Cisco 3750G Core switch which has physical connections, each configured as trunks to two HP Access switches. The client who uses these access switches would like to put a link between the two, but this would create a loop.
------- Core Switch -------
| |
| |
[Code]....
I have a 2x Cisco 3750G switches (Stacked) that are part of an IP Video Surveillance System .All network is set to 1 VLAN (VLAN 1 default).The Cisco SWs ( Core ) are configured with IGMP Querier + Snooping .Connected to the Cisco SWs are 4 Fiber Rings(Loops) for redundancy . RSTP and IGMP Snooping are enabled on all the network SWs .Network Architecture Figure :
When all Fiber Rings (Loops ) are connected , the Cisco and Ring SWs spanning-tree tables show the blocked and forwarding ports properly .I am able to connect all my IP Cams + Encoders to the Ring SWs and connect my Servers + WorkStations to the Cisco SWs to record and view the multicast ip streams .All streams from Rings 1 ,3 and 4 are getting normally to the Servers + WorkStations through multicast ( IGMP Snooping are filled correctly on the Cisco and non-Cisco SWs ) . All multicast streams are joined normally except for Ring 2 .The Multicast streams passing through Ring 2 will operate normally for around 2 hours then after that the Fiber SWs begin to flood their multicast traffic causing the cams on the same switch to drop off the network .
I checked the Configuration of all the SWs on Ring 2 but all are are the same .
What is weird is that I have to set all the streams to unicast to stop the flooding just on Ring 2 (All other rings are not affected ) then after some time if I enabled a video multicast stream on one of the SWs of the Ring it will be streamed properly to the Servers + WorkStations ( All IGMP tables along the way will be filled properly ) then again after 2 hours or so , the flooding will start again suddenly and all IGMP table entries for the SW on Ring2 will be empty . No problem occurs on the other Rings which have more multicast streams .
So, I spent some time this weekend troubleshooting the issues I've had with the new SG300-28P switch and POE to many of my devices in the office. As a recap, I cannot utilize all of the 24 POE ports on the switch for POE purposes. Really only every other port [with a few odd combinations thrown in between]. In addition, the SG300-28P switch, on occasion, is sending POE to non-POE devices [e.g. my Ruckus Zone Director 1106].
Here are my POE devices [all 802.3 af-compliant]: 3 Ruckus 7982 access points1 Pakedge access point2 home-automation controllers2 Polycom voip phones I called Cisco support several times in regards to this problem, and they figured it was a hardware issue - a faulty switch. So, Cisco sent me a replacement SG300-28P, which I hooked up today. The exact problem still occurs. Default configuration [fresh out of the box]. No way I can land, for example, the 3 Ruckus 7982 AP's on ports 1, 2, and 3 [or ports 1,13, and 2]. I have to put them on ports 1, 3, and 5 in order for them to power up. In addition, I can't plug any other POE devices on the ports either between or below them. I had to skip another port bay. This is very odd behavior!! Two Cisco SG300-28P's in a row with the same problem.
However, I also had one of the new Cisco SG300-10P switches in my possession for a recent project of ours. I decided to hook up the same POE devices to this switch. ALL POE devices were recognized and worked! No need to skip a port. And it didn't matter what device was plugged in first or not. I am now convinced that it is either a hardware issue [bad power supply/transformer?] inside all of the SG300-28P switches, or a firmware issue.
Both of the SG300-28P switches were running firmware 1.1.2 [the latest on Cisco's website]. So, I decided to install an older firmware version on the SG300-28P switch that I'm returning [installed 1.1.1.8]. Here's what I found out. I could then plug 2 POE devices [e.g. two Ruckus AP's] in adjacent horizontal ports, but not three in a row. In addition, not all adjacent ports. It's funky. For example, I could plug an access point in ports 20 and 21, but not in 21 and 22. No rhyme or reason in how it worked. And I still couldn't plug an access point in adjacent vertical ports [e.g. ports 1 and 13]. BUT...
It's interesting that the same exact switch that would not initially allow 2 horizontally-adjacent POE ports to be utilized WOULD allow 2 horizontally-adjacent POE ports to be utilized when running a different firmware version. It's also interesting to note that when plugged into a "non-working" POE port, the SG300-28P would actually make a small whining noise. Very subtle noise; I could hear it when approx. 1ft away from the switch. The noise was not noticeable when ports were skipped [and POE actually worked]. Therefore, I believe that Cisco has some SG300-28P firmware bugs [at least in the last two versions of firmware] that is not truly allowing all 24 ports to utilize POE correctly. This problem does not exist with the SG300-10P switch.
In addition, I'd like to know when they think a solution could be created if it's firmware-related. If hardware-related, I don't think I'll be recommending any 28P switches in our projects. Perhaps just the regular SG300-28 with a separate SG300-10P. It's a shame because the SG300-28P is more of a bargain when compared to the two separate components.
I have a CiscoWorks LMS 2.6 and i would like to know if the new Switches Catalyst 2960-S Series are supported with this LMS version?
View 1 Replies View Relatedwhat are all the CLI commands supported by Cisco SFE 2000 switch?
View 2 Replies View RelatedI know the white papers say that the RPS 2300 supports the 3750-E series and the 3750 series, but we have 3750-G and -X series. Wanted to make sure that these switches are supported and if we need anything special?
View 3 Replies View RelatedIs WAN Optimization supported on Cisco ASA5520 Firewall and Cisco 3750 Switches. We need to add/enable WAN Optimizer functionality to make 3PAR data replication?
View 9 Replies View RelatedWhich transmit hash policies are supported by the SLM2008? I can't find this information in any of the documentation for this switch, all that is stated is that it supports Link Aggregation using IEEE 802.3ad LACP. I'm connecting to a Netgear ReadyNAS Pro that supports Layer 2 and Layer 3+4 transmit hash policies and I'm not sure which to choose (or whether it matters).
View 2 Replies View RelatedSFP-10G-ER are not supported on Catalyst 3750-X and on other switches ....
%PHY-4-SFP_NOT_SUPPORTED: The SFP in Gi1/1/1 is not supported
Why ?When will ER be supported ?
What all the catalyst models support VPC with Nexus ? I knew Cat6K and 3750. Any other model supports VPC ? Can I configure vpc between 2960 and N7K ?
View 3 Replies View RelatedWe have a switch in our IT office, Cisco 2960G. It plugs into the wall and goes to the server room and connects somewhere. This weekend we redid almost the whole server room and now this switch can connect to the rest of the network. The uplink has a link light but can get anything.
I have rebooted the switch, used scanning on our other switches to try and find the MAC of the switch but for the life of me I cant see it. Is there a command I can run from the command line of the switch to see where its pointing?
I am trying to configure SNMPv3 on a 2960G (12.2.(55))
snmp-server view v3view interfaces included
snmp-server view v3view internet included
snmp-server view v3view chassis included
snmp-server view v3view system included
snmp-server group v3group v3 priv read v3viewwrite v3view notify v3view
snmp-s user v3user v3group v3 auth md5 v3secret priv aes 128 v3secret
Interestingly enough when I 'sh conf | i snmp' the user command isnt there, however it shows it under 'sh snmp user'. Using Solarwinds Eng Toolset to attempt to just pull interfaces and it keeps kicking back with creds failing.
I'm having a problem at the moment getting a Cisco switch (2960G) to work properly with a Dell blade enclosure. The config that we have on the switchports is;description Bladeswitchport access vlan 120 speed 100duplex fullndhowever, with this configured, it's throwing up a lot of CRC errors. I've taken the last two lines out, and there are less CRC errors but the connection starts running really slow.Are there any further steps that I would need to take to fully troubleshoot the issue, or is there a simple config change that could be made to resolve it?
View 6 Replies View RelatedI have this OID "1.3.6.1.4.1.9.1.696", which is a "Cisco Catalyst 2960G-24TC" device. Where can I find the corresponding MIB tree with availabe methods?
View 2 Replies View RelatedI have routing enabled, can build a static route, and go back and see it (sh ip route), but I don't know how to get the route right. I have one host (Host A) on Vlan 20 w/192.168.20.2/24 dg 192.168.20.11 (the vlan ip) and (Host B) on Vlan 30 w/192.168.30.2/24 dg 192.168.30.11 (the vlan ip). I can't ping them from any host man. I can ping the Vlans but not the host.
View 19 Replies View Relatedi have a cisco catalyst 2960g and for some reason out of the blue, some interfaces go down and then up. It started doing it after a power cycle.
View 1 Replies View RelatedI have 2960G that in rommon status.I need that the switch work in 0x2102 (regular mode).I don't have a backup to configutratuio in my PC.I do wr before the switch go to rommon (startup config).What to do in order to the switch will be in 0x2102 (regular mode) with the same configuration( before the switch go to rommon)?
View 1 Replies View RelatedI have a 2960 sw configured for dot1x authentication, the problem is the Guest VLAN and Restricted VLAN didnot work. The switch port was stuck in authenticating status. The server is Juniper IC4500.
View 2 Replies View RelatedI have a few 24-port Cisco 2960G Switches (model WS-C2960G-24TC-L) that I upgraded to IOS Release 15.0(1)SE2 using the web interface. I am now trying to upgrade those switches with the new release, 15.0(1)SE3, however I seem unable to do it, I have tried this on two switches so far, both have been upgraded to SE2 just a couple months ago or so, and both of them will not accept the SE3 upgrade, basically, I can select the tar file in the web browser and click "Upgrade" but when I do the status never changes from "Loading the tar file to the switch". I have tried multiple times from multiple computers using many different web browsers, including IE6 which is listed as supported. I have let it go for as long as 1.5 hours but to no avail.I also had a few idential switches here that had never been upgarded to SE2, I have had no problems loading SE3 onto them using the same method so it would seem that the tar file I have downloaded is valid.
View 5 Replies View RelatedI am having issue while connect the cisco 2960G and nexus 5000, i have attached the network setup. so kinldy check and update how i can proceed further.
View 2 Replies View Related
