Other Network Architecture Subjects

Are firewalls the same as CBAC on a router, and do they work by checking out going connections then checking the return traffic, , also say i had a web server, how does the pix make sure no other traffic or protocols get through ?cheers

hi all, is it possible to get a 3640 router with a NM-1FE-FX(100basefx) module and a WS-C2950C-24(100basefx) switch and setup 802.1q between them??TX

On my network, the internet goes via the pix, basically allowing only port 80 outbound, does the pix automatically let these sessions back in ? would it make a difference if I allowed say port 80 inbound ? or would i only do this for a server ?

Hi there,we are powering down our 6509 and have backed up the MSFC IOS Config file to TFTP and to startup config.However we are running CatOs (Hybrid Mode) as well. Is the VLAN database in CatOs held in vlan.dat like IOS or is it held in RAM? If I ...

We have a cisco 2600 series router that is exeriencing high cpu usage. The bandwith usage is only about 20% on a 100mbps pipe when this happens.When the bandwith is below 20% every thing is ok but after that mark it pegs to 100% usage and connectivit...

Hi,are there any special ios-requirements for implementing 802.1q-tunnel on a Cat3550 switch?when configuring "switchport access vlan", "switchport mode dot1q-tunnel" on a interface and "vlan dot1q tag native" in global configuration the "show dot1q-...

We went live with a set of 3560G-48s a few weeks back. We have basic a basic policy map applied to some of the ports to DSCP mark select traffic, but a pretty stock setup other than that.This week we noticed that large file transfers from our Gig con...

When I set up subinterfaces on my router, can i still assign an ip on the physical interfaces to ?

Hi there, Somehow my cisco 836 has had it's nvram erased and i cannot restore it using the console, all it says is rommon and i do not know how to reflash it from that please help !!

If I have an internet connection, with 1 ip assigned to my wan interface from the isp and 1 ip for my mail server which is natted to a public address, what will the source be from outside, the wan interface or the external ip of the mail server ?

???

We have Cisco 1841 router, 2 MBPS leased line, Cisco 3560 layer III switch,515e PIX and Squid proxy server running on Linux. We use 193.168.1.x IP for internal usage. We created 1 new subnet i.e 192.168.2.0 . A guy from vednor configured layer III s...

hi,I have a big problem with a 4507R catalyst switch(The all port are 1Gb).When I configure a port to 1G, this port connect, disconnect,connect, disconnect ... But when i configure this port to 100M it's ok.The pb is that the all port are busy, i do...