Other Network Architecture Subjects

Investigating a problem I noted that the arp entry on a Cisco 5500 RSM (11.2) for an IP (NT Server) address is apparently getting refreshed ever 0-10 minutes. A "show ip arp a.b.c.d" shows the "Age" consistently less than 10 minutes, typically 1-2 m...

I am working on an access list for my router and am a real Nervous Nellie about it. I have a mail server with six virtual hosts and a webserver with mail and ftp as well as a hundred virtual domains, all with their own IP addresses within the same C...

Hi,encounter problems on accessing the router via telnet from Internet when NAT is applied to the WAN interface of the router. The access-list that tied to the NAT statement has already permit all traffic to pass thru. I have tried adding the command...

On every Cisco course they told me to configure the duplex-settings on a switchport from the standard auto to a fixed half or full setting.I experienced this always as good practice, because i had several cases where this "fixing" solved big throughp...

I am creating a simple access list on a Cisco Catalyst 3550 :access 1 permit 192.168.168.254access 1 deny 192.168.168.35Then I apply it to the specific port:access 1 inBut I can still ping IP address .35 from the machine on the port in question and f...

I'm looking for a mib for the 4006 that will let me check the status of all 3 power supplies. the cisco-stck mib only checks 2.

Hi All,What is the best/cheapest way to connect 2 lans in the same building over fiber. I have a switch in office(A) where i can plug fiber, what shoul i have in office(B)? what is the best practice? Should i use Router --fiber--Router or Switch --f...

I have wan(bri using ddr) with 2 2600 series routers with a collection computer on the Lan receiving data from a switch over ISDN. The switch delivering the data send it specially to that pc address. As is the application works no problem; howeve...

i have cisco 2000 router and its not booting at all i mean the router> prompt doesnot comeup at allcan somebody help me please asap.

we have two check point firewalls in cluster. We defined Multicast MAC address on 6509 switches it was working fine till we have 6.3(8) but since we downgrade to 6.3(7) ( to resolve other issues) we have random issues with check point VPN. Firewall v...

I have a 5000 series switch running 6.2 software configured as an access switch connected to a 6509 w/msfc as a dist switch, when hosts turn on their multicast application some joins make it up to the msfc router vlan interfaces and some do not thes...

We have a 6513 switch with a Fast-Ethernet module and 2 Gigabit modules.But everytime we configure port spanning on the gigabit ports and connect the sniffer,it crashes the switch.Port spanning works fine on the Fast Ethernet ports.Is this a bug or I...

Hi All, Does anyone know a good link for the white paper on QOS?I have two PVC's to one of my remote office, one 128k PVC is for video conferencing and the 1024k PVC is for all other IP traffics. Can I use the route-map to do the QOS or is there a ...