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Im confused about the Active and Standby timers used within HSRP.  From the Cisco website:ACTIVE TIMER: This timer is used to monitor the active router. This timer                     starts any time an active router receives a hello packet. This tim...

lquin1978 by Level 1
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Have a bit of a dilemma on my hands, let me paint the picture:I have two offices connected by two bonded point to point T1sI’m on old 1841 routers with 2 WIC-1DSU-T1V2 cardsData connection seems to be great, T1s bond and give me whopping 3megs of ban...

We made a mac access-list to block a especific vendor:mac access-list extended list1deny vendorID 0000.00ff.ffff anydeny vendorID 0000.00ff.ffff anypermit any anyand applied on interfaces...interface fa0/1mac access-group list1 inWe also have a port-...

imfvieira by Level 1
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Hi, I'm evaluating some LAN design proposals and am seeing two distinct designs emerge. The switches are to be located across a pair of comms cabinets.Some designs propose a single (6 x 3750X) stack split across the two cabs. Others propose a pair of...

I have a monitor session process set up to forward data from 4 ports to a single output port. I am surprised to see that on the output port, the rate of output drops is steadily increasing:  Input queue: 0/75/0/0 (size/max/drops/flushes); Total outpu...

I have been replicating the configuration from our old router (2621), to a 3945 ISR. One thing that I can't quite understand is the sub-interface.My main network (Network 1) is 172.16.100.0 255.255.255.0gi 0/0 is 172.16.100.1 255.255.255.0gi0/1 has n...

enjoimark by Level 1
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Hello,I'm asking this based on your experience.How many of you use DHCP Snooping , DAI and IP source guard in your network ? I want to make my network more secure and I was looking at this. When I was reading docs about this, everything seems wonderf...

Vinny by Level 1
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Resolved! HSRP Learn state

Reading up on HSRP and I saw the following  on the Cisco.com website:Learn - The router has not determined the virtual IP address and has                     not yet seen an authenticated hello message from the active router. In this                 ...

lquin1978 by Level 1
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Since VLAN 1 is the "default" vlan, does it get passed in a trunk even though VLAN 1 has been disabled on the switch?Again VLAN 1 being the "default" vlan, does it get passed even though it is not on the vlan allowed list?    

Steve Fry by Level 1
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                   We currently have a wireless link between some of our sites that appears as a multi-point mesh to the network even though it is physically a point-to-point network. We are looking to provide a backup link for this mesh using a diff...