Switching

Our office connects to our colo, which provides our internet connection.  AT&T limits the number of MAC addresses.  To prevent AT&T from seeing all the MACs on each side of the connection I need to set the switches to route all the VLANS on layer 3. ...

Hi  all. I have faced slow download speed due to duplex-setting. I'm using  Cisco 1721 with WIC-1ENET card. The speed of this card is 10mb. I have  ADSL modem connected to this interface card, and my router use pppoe to  dial-up the connection. Every...

I am planning to add one additional connection to two port channels in our data center.  Each port channel runs between a 7606 and a 6509E.  I plan to connect, configure, and activate the ports without deactivating the port channels themselves.  Is t...

We've got some non-Cisco end gear that only support 100MB and an interface using1300nm mm fiber. It is a power plant environment so that means fanless gear and low-temp ruggedized SFP's are desired.Cisco makes two SFP's that might work for this appli...

Hi All,We're experiencing a strange situation on a 3750G PoE switch running advanced IP Services featureset whereby frames switched solely at layer 2 (e.g. between IPv6 hosts within the same vlan), but as soon as the frame is forwarded at layer3 thro...

Hello All,I need some help with cisco 6509 PIM configuration.I have a network where cisco is connected with third party switch, which is sending pim hello packet to cisco in a vrf and cisco is showing this type of message:"Ignored unknown option 2 in...

I have heard that if we attact a hub in between the wires we are easily able to analyse the traffic that goes through that wire,Tell me the full procedure how to set it up, with what softwares and OS I can analyse the traffic. ?

I have a ME 3400 that is acting flaky.  I have this device acting as a distribution switch and it is reachable on VLAN 127, which is one of the VLANS trunked to our core network.   When I try to configure one of the fastethernet ports (changing duple...

recently my coustomer bought a 4506E switch(SUP6L-E;WS-X4548-RJ45V+;PWR-C45-2800ACV) .when use their old cables(568a-568b),they found that the 7911 phones(no standalone power) displayed :"ethernet not connect",and the switch console (show power inlin...

hi all,attached my topology.i need some way, to propagate network 200.0.0.0/24 resides on the middle switch on vlan 200.the network showld be propagate to all ospf stub areas, so that routers that not directly connected will know how to reach it.curr...

Hi Guys,I'm currently installing some new switches (2960-S) for a customer.  They have this building managemenet syste,m that requires connectivity throughout the LAN.  I've segmented them into a VLAN (VLAN4) and given them an ip arange of 192.168.1....

I have several 3560E switches in  my environment running c3560e-universalk9-mz.122-52.SE.bin code. When I pull a fan Module out I get the following messsages:23w0d: %HARDWARE-5-FAN_NOT_PRESENT: Fan  is not present23w0d: %PLATFORM_ENV-1-FAN_NOT_PRESEN...

I have an existing switch stack that is comprised of two (2) WS-C3750G-24TS that are interconnected using the stackwise stackng cables. I have a third switch to add into this stack for expansion. Is there anything special I need to do to the switch b...