Other Network Architecture Subjects

HiPlease find below the output of "show ntp status" command on a NTP Server & client Routers.NTP ServerClock is synchronized, stratum 2, reference is 208.184.49.9nominal freq is 250.0000 Hz, actual freq is 250.0001 Hz, precision is 2**18reference ti...

HelloWe have a lot of checksum errors in our 6509. Here is a part of our log:2005 Sep 06 15:10:04 MEST +02:00 %SYS-4-SUPERVISOR_ERR:Forwarding engine IP checksum error counter = 28012005 Sep 06 15:40:06 MEST +02:00 %SYS-4-SUPERVISOR_ERR:Forwarding en...

If I have 2 vlans say 3 and 4, both in different subnets, how does each one get the the internet and do you need to put encapsulation on the trunks ?

I would like to apply multiple MAC addresses to switch ports for security, but I would like to apply the same list of MAC addresses to all the ports. Allowing for PC mobility within a branch office, but only allowing pre-defined MACs. This would also...

After removing two 6248 modules from a 6509, they do not show up after issuing a "show module" but the ports that were assigned to users are still in the running config. Is there a way to clear this out of the running config without rebooting the swi...

Are there any specific requirements when using Fiber GBIC uplinks? E.g. I have the following setup:The GIBCs are 1000BaseLX from the core side (4509/SUP IV/WS-G5486=) and 1000BaseLX SFPs from the distribution side (3560/GLC-LH-SM). The result I got w...

Ok, I have several 2950T's. (Version 12.1(22)EA5)When I try and connect two of them together using their gigabit ports with a CAT6 crossover cable (all four pairs crossed, tested with gigabit fluke) I get CRC and input errors that causes severe bandw...

Hi,I once read the limitation of the maximum switches that can be connected in a loop within single STP domain, but I can’t find any document today...Knowing that we can modify the timers, we are aiming for a fast converging network, so we won’t incr...

Can anyone tell me why I would keep on getting address flaps on both of the up link ports on my switch ?cheers

I have a pair of MS2000 clustered servers connected to a stack of 3750 switches on ports gi1/0/9 and gi2/0/9.After a failover of the ms cluster, the original primary node cannot be 'pinged' outside its VLAN.You can ping it within the vlan, and from t...

We have two Cat6000-MSFC2 running IOS Version 12.1(11b)E and CatOs 6.4(13).We are esperiencing intermittent loss of packets on some VLAN and we noticedthat on that VLANs interfaces there are many input drop packets: Input queue: 0/75/200444/0 (size/...

On an internet router, how does this get back to my default router, we have loads of differnet networks that all go through the internet router, but I want to know how they get back to my default router ?

what are these 2 used for, is it to stop the port from blocking when spanning tree reconverges ?

do people normally use crossover cables to uplink switches ?