Use of straight through and cross over cable

hi,
according to icnd1, we need to use crossover cable to connect similar devices, lets say router to router or switch to swicth..
does this really matter? I mean, what if i use straight through cable to connect one switch to another?
thanks

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Hmm, I don't know, does it really matter whether the link between devices can be used? (Laugh)
As the other posters have noted, many (newer) devices now support auto MDI/MDIX, but some don't. (Also, on devices that do, auto negotiation might be required to be enabled.) Some older devices sometimes have "special" uplink ports or manual method to switch the port's MDI/MDIX setting, and for those, too, you can use a strait through cable.
If none of the above, however, you'll need a cross over cable for "similar" device types, i.e. those whose tx/rx pins, on the port, are the same.
You need a cross over cable if both sides are MDI or MDIX (i.e. the same), straight cable if both sides are different.

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Sometimes I connect and the connection works immediately, on other occasion I have to restart one of the macs or both to make it work.
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>
Vitthavat A. wrote:
> In Merchandise Distribution (conceptually),
> - for recipient-driven flow through, picking is done before GI.
> - for cross-docking, no picking.
>
> Which configuration controls the picking has to be done in flow-through and not to be done in cross-docking?
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client.vi ‏32 KB
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stringtoarray.vi ‏37 KB
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CROSS_OVER_VIA_HOLE.jpg ‏344 KB
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Router DHCP Straight Through / Cross Over

Hi All
I am encountering a very strange issue. I've configured our 1921 router with DHCP. Then I've connected my laptop (to test) using a straight through and cross over to the router, but it doesn't pull an IP. I followed the commands and verified it from several sites. What else could be wrong?
ip dhcp pool DHCPPOOL
network 192.168.1.0 255.255.255.0
dns-server 4.2.2.2
default-router 192.168.1.1
ip dhcp excluded-addrss 192.168.1.1 192.168.1.99
service dhcp
Appreciate any input!

Current configuration : 3860 bytes
version 15.2
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
hostname Router
boot-start-marker
boot-end-marker
no aaa new-model
no ipv6 cef
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ip dhcp excluded-address 192.68.1.150 192.168.1.254
ip dhcp pool DHCP-POOL
network 192.168.1.0 255.255.255.0
dns-server 66.80.131.5 66.80.130.23 64.7.11.2
lease 7
no ip domain lookup
ip cef
multilink bundle-name authenticated
crypto pki token default removal timeout 0
crypto pki trustpoint TP-self-signed-1406017923
enrollment selfsigned
subject-name cn=IOS-Self-Signed-Certificate-1406017923
revocation-check none
rsakeypair TP-self-signed-1406017923
crypto pki certificate chain TP-self-signed-1406017923
certificate self-signed 01
3082022B 30820194 A0030201 02020101 300D0609 2A864886 F70D0101 0505003
quit
license udi pid CISCO1921/K9 sn XXXXXXXXXXXXX
username grant privilege 15 secret 5 $1$LgZ4$UXZanBF9.F45dXzBT1Fqy.
interface Embedded-Service-Engine0/0
no ip address
shutdown
interface GigabitEthernet0/0
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly in
duplex auto
speed auto
interface GigabitEthernet0/1
no ip address
shutdown
duplex auto
speed auto
interface GigabitEthernet0/0/0
ip address x.x.x.82 255.255.255.240
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ip virtual-reassembly in
duplex auto
speed auto
ip forward-protocol nd
ip http server
ip http authentication local
ip http secure-server
ip nat inside source list 1 interface GigabitEthernet0/0/0 overload
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line con 0
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line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
stopbits 1
line vty 0 4
login local
transport input all
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end
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Use of straight through and cross over cable

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