Cisco R&S: How to configure a Router to be a DNS server

! Enable DNS on the router G00-2811-01(config)#ip dns server ! Enable dns spoofing G00-2811-01(config)#ip dns spoofing ! Enable domain lookup G00-2811-01(config)#ip domain-lookup ! Configure the external servers ip name-server 195.5.128.130 ip name-server 195.5.128.137 ! (Optional) Configure the domain name G00-2811-01(config)#ip domain name me.com ! Configure the pool to use the routers sub interface as dns-server … Continue reading Cisco R&S: How to configure a Router to be a DNS server →

Cisco Wireless: How to configure a named access list to deny traffic from a Visitor Vlan to Internal Resources

This is what I am trying to achieve. I would like the Guest Vlan to get access only to the internet. Everything else is banned. Here is what i have so far: interface FastEthernet0/0 description To_Internet ip address 1.1.1.1 255.255.255.252 ip access-group 102 in ip nat outside ip inspect RED out ip virtual-reassembly in duplex … Continue reading Cisco Wireless: How to configure a named access list to deny traffic from a Visitor Vlan to Internal Resources →

Cisco R&S: Configure AAA with local authentication on Cisco Router

First let us configure local authentication to use this username and password G00-2921-01/29(config)username admin privilege 15 secret 0 admin G00-2921-01/29(config)enable secret 123456 Enable AAA on the Router G00-2921-01/29(config)#aaa new-model Configure local authentication. This uses the username and the password that I have already configured on the router for authentication. G00-2921-01/29(config)#aaa authentication login default local I … Continue reading Cisco R&S: Configure AAA with local authentication on Cisco Router →

Cisco Wireless: How to perform Carrier busy test on cisco AP

1141-01#dot11 dot11Radio 0 carrier busy 1141-01#sh dot11 carrier busy Frequency Carrier Busy % 2412 27 2417 21 2422 23 2427 26 2432 12 2437 21 2442 23 2447 10 2452 18 2457 21 2462 32 2467 32 2472 12 1141-02#dot11 dot11Radio 0 carrier busy 1141-02#sh dot11 carrier busy Frequency Carrier Busy % 2412 31 2417 … Continue reading Cisco Wireless: How to perform Carrier busy test on cisco AP →

Cisco Telepresence: Comparing the Cisco Codec SX20 and Codec 40

Basically, I was trying to compare the two. All the info is available in Cisco.Com but i decided to make a table for easier comparison 🙂 I think i will settle for a C40 though it is twice the amount 🙂 SX20 Codec C40 Unit delivered complete With SX20 Codec, Cisco TelePresence PrecisionHD Camera … Continue reading Cisco Telepresence: Comparing the Cisco Codec SX20 and Codec 40 →

Cisco VoIP: Troubleshooting IP Phone Registration

1) Check DHCP configuration (option 150) 2) Check flash for firmware 3) Check tftp server command for files required 4) Commands: debug ephone register debug ip dhcp server events debug ip dhcp show ephone-dn summary … Continue reading Cisco VoIP: Troubleshooting IP Phone Registration →

Cisco R&S: Attributes used by BGP in route selection

Nexthop - Should be accessible, otherwise, drop. Largest Weight. Not part of the routing update. Largest Local Preference. Prefered path to a remote destination. Part of the routing update. Default is 100. Local to the AS. Originated by BGP running on this computer. Shortest AS-PATH. Lowest origin type. IGP < EGP < Incomplete Lowest MED … Continue reading Cisco R&S: Attributes used by BGP in route selection →

Cisco R&S: Verification Commands for BGP

#sh ip bgp - entries in BGP routing table #sh ip bgp neighbors - BGP and TCP connections to neighbors #sh ip bgp rib-failure - networks that are not installed in the RIB and reason why #sh ip bgp summary - status of all connections #show ip bgp neighbor address advertised #show ip bgp neighbor … Continue reading Cisco R&S: Verification Commands for BGP →

Cisco R&S: Frequent commands used when configuring BGP

#router bgp 100 - only one BGP process per router #network x.x.x.x mask x.x.x.x - using this command will not automatically form a neighbor relationship #neighbor x.x.x.x remote-as x.x.x.x - peer router #timers bgp x x - change the keepalive and holdtime timers respectively #neighbor x.x.x.x update-source Loopback 0 - Instruct the router to use … Continue reading Cisco R&S: Frequent commands used when configuring BGP →