Why I can't get the "cdpInterfaceExtTable" by SNMP ? The other CDP info are correct, only this table is empty.
I found the configuration method in CLI:
interface GigabitEthernet3/0/13
switchport priority extend cos 5
interface GigabitEthernet3/0/14
switchport priority extend cos 5
But I still can't get anything back when I walk this node,
I have 8 switch stack consisting of six WS-C3550-48P and two WS-C3750G-16TD running software vesrion 12.2(25) SEB1. When I added new C3750v2-24PS (running image 12.2(50) SE5) in stack so I up-graded the image of existing 8 switches with latest veriosn 12.2(50) SE5. Once I have done with the upgrade then all ports of my stack switches went down after around five minuts. Is it image compatibility issue with existing switches or something else?
View 7 Replies View RelatedAre there any best practices for preventative maintenance on Catalyst Chassis switches. Looking to build a PMI schedule for a customer. Or is there evidence not to perform it at all. Things like re-seating line cards, cleaning fan exhausts, etc.
View 1 Replies View RelatedI was thinking of upgrading the IOS of a number of c3750 stack (roughtly about 50-100 stacks around the country)...I would like to know is this feasible?
My CiscoWork NMS is connected with a low bandwidth (2Mbps) management link. I was thinking if I upgrade via CW2k, then RME will take "ages" to push the IOS to the stack, right? Is this feasbile for 100+ stack of switches?
I have a VMware workstation on my host computer (windows 7) and the VMware workstation has a virtual machine (windows 7) on the host. We were trying to allow internet access only to the Virtual machine, i.e. to minimize exposure of the host to the internet. I tried to use Vlan Access Control list with MAC ACL to deny the host virtual machine from accessing the internet and allow all other traffic including the virtual machine. The configuration works for some time and after some time when the virtual machine continously pings the c3750 switch (wher the VACL is implemented), the host also pings the c3750 switch and re-establishes connection with the internet. But when we configured the c3750 switch to deny the VM and allow all other traffic, it works fine. It seems like the host automatically finds a way to get arround the VACL.
View 0 Replies View RelatedI have a switch cisco c 3750 that has vlan information, how to remove vlan information.
View 1 Replies View RelatedI have WS-C3750-24PS version 12.2(55)SE4. I am configuring PBB VPLS. MY PE/P routers are alcatel 7710/7750
my topology is like that.
CE1<-------> Provider_switch(3750)<-------> PE1 < ----IP/MPLS----> PE2<-------> Provider_switch(3750)<----------->CE2
16 11 11
[Code].....
We have c3750s running NAC 4.8. Occassionally, a workstation will flap between the untrusted and trusted vlans. We updated the NIC drivers on the workstation, we verified SNMP was functioning correctly on the switch, and we allowed the phones to act as the pass-through between the workstation and the switch. What could cause the workstation IP Address to not redirect to a TRUSTED VLAN from the NAC_UNTRUST VLAN? All updates have been downloaded to the workstation.
View 1 Replies View Relatedwe have coonection between c3750 and wlc 5508 and it shows that mac address flaps between two interfaces of c3750. [code] two ports are trunking and one port is for management purposes and the other port is for the all other vlans. But it shows that it flaps always. And i think WLC uses one mac address for all device and not for port specific and that causes problem.
View 6 Replies View RelatedI am having troubles to get 2 C3750-X switches WS-C3750-X-48P-L) to stack. They are both running iOS 15.0(2)-UNIVERSALK9, and are licensed for IP Base.
If I connect stack port 1 of switch 1 to stack port 2 of switch 1, and stack port 1 of switch 2to stack port 2 of switch 2 I get the following:
WS-C3750-X_STACK1_SW1>show switch stack-ports summary
Switch#/ Stack Neighbor Cable Link Link Sync # InPort# Port Length OK Active OK Changes Loopback Status
[Code].....
I have tried restarting (powering off for about 1 min and turning back on) simultaneously, and powering off switch 1 for 1 min and switch 2 for 2 min. I have also tried both enabling the stack ports, and disabling followed by enabling.
I have 2 switches c3750 which I want to install in stack to replace two Nortel switch that I have in production.
When connecting my new stack of cisco switches to a cisco router c3750 to 2600, they begin to restart by itself. I mean, There is a cisco router 2600. which I want to connect to the stack of switches. The problem is that when the switches connect to the router it begins to restart.
If you need to see the running config of the cisco Switches or the 2600 router.
I have a cable from an SFP module in a WS-C3750-48P with 12.2(55)SE1 running to a Gigabit port on a Cisco WLC. After the switch recovers from a power failure, the gigabit autonegotiation fails. The cure is a long drive to unplug and reseat the SFP. Note this happens at too many similar sites for this to be a loose connection. Interface shutdown then 'no shutdown' is not sufficient. The state is 'line protocol is down (not connected)'. Interface is configured for switchport mode trunk (auto speed, auto duplex). Command 'switchport nonegotiate' makes no difference. Is there a more powerful command than 'shutdown' which might toggle the interface signals? Is there some way of resetting the SFP? sh int gi 1/0/1 displays 'media type is 10/100/1000BaseTX SFP' and zero packets received.
View 4 Replies View RelatedBuilding was recently upgraded from cat3 to cat6 wiring and I'd like to ssh into each Cisco C3750 stack and change every port on the stack to autonegotiate. I can release each port one at a time by doing "no speed" and "no duplex" after selecting each port (interface fastethernet x/x/x) , but it's taking forever as there are many stacks and each stack has a number of 24 and 48 port switches. The stacks are a mix of fastethernet and gigabit ports (C3750 and C3750G switches) if that changes anything command wise.
View 2 Replies View RelatedPrime 1.3 (POC testing), for testing purposes I discovered a class C range (255.255.255.0) containing a bit of everything (AP 1240, C3560 & C3750).When looking in the config archive only the AP's have configs stored, the others failed, snmp & telnet credentials are the same for the whole range, what could I do wrong ?
View 5 Replies View RelatedI have this system: IOS (tm) C3750 Software (C3750-I5-M), Version 12.1(19)EA1d, RELEASE SOFTWARE (fc1
An error appear in console (many times in one minute):
Jan 3 16:25:37: %LINK-3-BADMACREG: Interface StackPort1, non-existent MACADDR registry for link 0
-Process= "<interrupt level>", ipl= 4
-Traceback= 20A364 187F04 58D6FC 58B950 2D7CE0 2E00C8 2E2BEC 2E2F24 2B0BF8
What is the problem? What is the solution?
I would like to apply policing on a C3750 interface, for all traffic matching 10.0.0.0 / 8, except for sub net 10.0.0.0 / 24. I plan to apply the following configuration, with an ACL that denies 10.0.0.0 / 24 then accept 10.0.0.0 / 8. I am quite sure of the answer but need a confirmation about the following configuration correct ? (10.0.0.0 / 24 will be not blocked, and no policing will be apply on it?)
ip access-list extended TEST
deny tcp 10.0.0.0 0.0.0.255 any eq 5000
permit tcp any 10.0.0.0 0.255.255.255 any eq 5000
[code]....
I have a stack of 2 C3750-switches (WS-C3750G-24TS-1U) with IPBASE-firmware (12.2(52)SE).
When I ping to a machine (in this case a virtual one), the replies are always received on the port where the machine is connected, but on the port-channel connecting to the stack of the 'pinging device' the reply comes only for certain initiators, and not for all.
Setting:
Gi1/0/6: Device/Server I want to connect too ; defined as access port
Gi1/0/25 + Gi2/0/25, as Port-Channel 1: The location of the devices I connect (read as: the uplink to the stack of the PC's), defined for Dot1Q-trunking
Monitoring setup: Source ports: Both: Gi 1/0/6, Po1 (or Po1 replaced by both interfaces)
For the machines which can ping the server I see 2 echo (ping) requests, followed by 2 echo (ping) replies ... So once seen on the Po1, and once seen on the interface Gi1/0/6.
However for other machines, the 2nd reply is missing ; which must be caused by the dropping of these packets in the switch. At least, I my opinion this must be the reason... But I can't see any (change of) output drops at int Po1, nor at Gi1/0/6. The CPU doesn't seem to have high usage, and even then, I don't think the error would be constant, as it's always failing for some PC's, and never for others... (at least for a certain time, a few hours it can be constant, the problem dissapears from time to time).
We want design a topology based on transparent proxies using WCCP. Our proxies can do spoofing of user ip addresses. So, the HTTP request will go out our network with the user ip address as source ip. The HTTP Response will arrive with destination address the user ip address. We want use WCCP to redirect inbound and outbound traffic because we have c3750 with L2 WCCP support. The outbound redirection, when the packet is going out our network is simple. But, the problem is the inbound redirection. How we redirect this packets to proxies by WCCP?. Is it possible?. This redirection is done by c3750 using TCAMs/hardware?. Our throughput could grow until 2-3Gbps and we are worried about the performance.
View 1 Replies View RelatedWe have existing stack of 3 units of WS-C3750-48TS-S ( 100 mbps ports with Gigabot uplinks). with IOS as follows, Can we add WS-C3750G-48PS-S in this same stack (this is 48 Gigabit ports)?
View 2 Replies View RelatedWe have several of these WS-C2960S-24PS-L running 12.2(55)SE5 C2960S-universalK9-M and need to upgrade to a better.IOS since we have a sitution where CPU would get to 100% but we have only a few ports connected.Also we have several of WS-C3750-48P running 12.2(55) SE6 C3750-IPBASEK9-M.
View 3 Replies View RelatedAccording to cisco manual in order to change SDM template i need to reboot switch, but when i have C3750-X stack do i need to reboot stack or maybe will be enough reboot in sequence the stack members?
View 3 Replies View RelatedWe are deploying the ISE MAC address authentication by-pass (mab) feature in our network as an alternative to port security on the switch port. Works well except for certain devices e.g. printers, snmp modules, and Unix/Linux Operating systems which can range from 5-10 minutes to never in authentication/opening the port.
View 2 Replies View RelatedI have 3 ws-c3750-48ps in a stack and i'd like to enable dot1x on the stack I entered the commands: [code] I also have dot1x enabled on several interface on the 2nd and 3rd switches in the stack with these commands [code] dot1x successfully works on these ports and I see the logs in acs, heres where the problem comes in when i try to enable dot1x using the above commands on any interface on the first switch in the stack it doesn't work its like the switch doesn't support dot1x. I'm assuming that there is a bug in version 3 but after googling I didn't come up with much.
View 6 Replies View Relatedcan i stack cisco (ws-c3750G-12s) with (ws-c3750X-24p-poe-s) with (ws-c3750-48p-10/100 poe) i mean even a switch is 10/100 and the other switch is 10/100/1000?
View 3 Replies View RelatedIs it possible to upgrade a c3750-stack one member at a time to avoid downtime? I need to keep L3-functionality up.
If I have one etherchannel from access-switch (2 channel-ports in 3750, in different stack-members), my 3750-stack as a distribution layer switch, and another etherchannel (also spread over multiple stack members) to core, can I upgrade the entire stack without traffic interruption?
We have a bunch of switches that are running fine but the running-config file is missing and we can't save the config to the tftp server. IOS is c3550-ipbasek9-mz.122-37.SE1. I've got lots of these switches running the same code that are just fine.
View 8 Replies View Relateda) I have three C3750-X switch stack together as my SAN switch and running on the new 15.0 release which is 15.0(1) SE.
b) Recently the master switch rebooted without any explanation. Create ticket with TAC and got an answer that it is due to a bug with ID: CSCtr31957.
My question is, which release that should i choose either the 15.0(1) SE3 or the latest 15.0(2)? Will it affect any of my configuration if i change to 15.0(2)?
Finally, what is the best practice to upgrade IOS in a stack whether to upgrade it 1 switch at a time or do it to all at once?
Is that possible add WS-C3750-48TS-E to ws-c3750e-48td stack?
View 4 Replies View RelatedOur client having one c3750 with ipbase license switch.They are connected server and end switches to that switch.Our customer want to increase the speed to accessing the server at that time I am told to use etherchannel.Customer happy about this and implement the etherchannel configuration.Now i need to configure etherchannel upto 4 physical link.server are connected on port no Ge1/0/10,they want to bind four phical link GE1/0/10-13.how to configure etherchannel in this switch?
View 1 Replies View Relatedwe recently had on our network a simple layer 2 loop problem, with big effects.Here is the situation: we have a C3750 switch, with STP activate on all ports.We don't have total control on this switchs, and for some reasons, it is possible that people connect a 2d switch on it (Cisco or non-Cisco).What happened several times is a classic case: a person interconnect 2 ports of this 2d switch, creating a loop. As the loop is created on the 2d switch only, the 1st switch detect no loop, the the uplink port keeps up.Afer this loop created, a broadcast storm occurs through the link between 1st & 2d switch .. and the storm propgates all over the LAN.I try to find some solutions to avoid that. One thing I would like to do is to find a mecanism on the first switch, which can permit to block the uplink port on the 1st switch if it sees the same MAC address as source in the 2 directions.Note that storm control, even configured to a quite low value (ie: 2Mbps) is not efficient enough to protect equipment (we have had big CPU impact on LAN equipments).
View 3 Replies View RelatedI have two layer 3 switches C3560 and C3750 Cisco switches with ios version "ipservices-mz.122-35.SE5".Now with the current ios version, these layer 3 switches are not supporting object group.so my question is , do i need to upgrade the ios, for this feature, if yes, which version ?
View 7 Replies View RelatedI have a new building to add to our campus and I have been encouraged to run single mode fiber. All of my other buildings are connected with multi-mode fiber. I just want to make sure i will not have an issue if I run single mode to the new building with SM SFP's.
View 2 Replies View RelatedI have a test setup of a C3750 stack as a core and some 2960's as access switches.[URL] - The switches at the bottom is the new network (VLANNED). The switches on the left is the current production network (10.1.1.0/24) From the C3750 to the router is a /30 network.
There will be 6 VLANs but at the moment I have one configured. VLAN50 - 10.5.1.0/24 From the C3750 I can ping my current production network, internet, other VLANs in the testsetup, ... Everything.From the C2960 I can ping other VLAN's, reach the gateway, reach the router, reacht the currenct production network. But I can't reach internet. I've configured "ip default-gateway 10.5.1.254" on the C2960. C3750 relevant config is down below.How is it that I can reach other networks connected to the router and not internet from the access switches? I'm just trying to ping 8.8.8.8.
!
ip routing
!
!
interface GigabitEthernet1/0/1
no switchport
ip address 172.16.1.2 255.255.255.252
[code]....