| Webproworld Forum Posts |
ASP/Access-display
data if field not blank
I need help with ASP/Access DB, again...
What I want to do is display data from the DB if there is data in the field, if not display nothing.
CSV
to mySQL
I have a CSV file I spun out from MS Excel that I would like to put in a mySQL table. I use two hosts that have different versions of phpMyAdmin and one host does not have the CSV upload option.
Replacing
null values from subqueries with 0s
Here's the situation. I'm building this into an
ASP page, but the query is an SQL query that I'm
stuck on, so here goes: I have three tables: Table
1, Table 2 and Table 3.
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09.22.05
Frame Relay Switch
 By Chris Bryant
One of the major topics on your CCNA and CCNP exams is Frame Relay. Additionally, Frame Relay is one of the most popular WAN technologies in today's networks.
Getting hands-on experience with Frame Relay in Cisco networks isn't just a good idea, it's a necessity. Let's face it, your employer is going to get a little touchy if you start experimenting with your network's Frame Relay setup.
To practice all your important Frame Relay commands for your exams, you need a working Frame Relay cloud in your home lab. A production network's Frame cloud consists of a lot of Frame switches, but if you choose wisely, a single Cisco router can act as your home lab's entire Frame cloud!
Before we look at the configuration of such a router (hereafter referred to as a "frame relay switch"), let's look at the physical requirements.
The more serial ports you have, the better. You should get a router with at least four serial ports. For frame switching purposes, it doesn't matter if the ports are synchronous or asynchronous - you just need the ports.
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You will also need some DTE/DCE cables. The DCE end of the cables will be connected to the frame switch.
A great configuration for a CCNA practice lab is three routers that serve as "production" routers, and a 4th router as a frame relay switch. (You'll want an access server as well, but that's another article.)
What I use in my student and customer pods is a setup where R1 is connected to the frame switch's S1 port, R2 is connected to S2 on the frame switch, and R3 is connected to the frame switch's S3 port.
Now comes the tricky part - the configuration. A frame relay switch's config can be hard to find, so here's a copy of mine. Pay particular attention to the config on ports s1, s2, and s3.
version 12.0
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname FRAME_SWITCH
!
!
ip subnet-zero
no ip domain-lookup
frame-relay switching
!
!
!
interface Ethernet0
no ip address
no ip directed-broadcast
shutdown
!
interface Serial0
ip address 10.1.1.2 255.255.255.0
clockrate 56000
!
interface Serial1
no ip address
no ip directed-broadcast
encapsulation frame-relay
logging event subif-link-status
logging event dlci-status-change
clockrate 56000
no frame-relay inverse-arp
frame-relay intf-type dce
frame-relay route 122 interface Serial2 221
frame-relay route 123 interface Serial3 321
!
interface Serial2
no ip address
no ip directed-broadcast
encapsulation frame-relay
logging event subif-link-status
logging event dlci-status-change
clockrate 56000
no frame-relay inverse-arp
frame-relay intf-type dce
frame-relay route 221 interface Serial1 122
!
interface Serial3
no ip address
no ip directed-broadcast
encapsulation frame-relay
logging event subif-link-status
logging event dlci-status-change
clockrate 56000
no frame-relay inverse-arp
frame-relay intf-type dce
frame-relay route 321 interface Serial1 123
!
interface BRI0
ip address 150.1.1.1 255.255.255.252
no ip directed-broadcast
encapsulation ppp
dialer map ip 150.1.1.2 name R2 broadcast 2335552221
dialer-group 1
!
ip classless
!
dialer-list 1 protocol ip permit
!
line con 0
exec-timeout 0 0
logging synchronous
transport input none
line aux 0
line vty 0 4
login
!
end
Read the rest of the article.
About the Author:
Chris Bryant, CCIE #12933, is the owner of The Bryant Advantage. The Bryant Advantage offers dozens of FREE CCNA and CCNP tutorials and articles. The Bryant Advantage sells the world's most comprehensive CCNA Study Guide, and my exclusive Binary Math and Subnetting Mastery book. My $299 CCNA Online Fast Track is the world's fastest-growing CCNA course. Visit http://www.thebryantadvantage.com today! |
