I am new to networking and am configuring, I am trying to setup my connections in packet tracers for 3 different routers to talk to each other over Serial ports as attached.
However, I did notice for some of the routers, their serial interfaces had their protocol's listed as down. Eg: from the output below.
Router(config)#interface serial 0/3/1 Router(config-if)#no shutdown Router(config-if)#do show ip interface brief Interface IP-Address OK? Method Status Protocol GigabitEthernet0/0 unassigned YES unset administratively down down GigabitEthernet0/1 unassigned YES unset administratively down down GigabitEthernet0/2 unassigned YES unset administratively down down Serial0/3/0 192.168.12.2 YES manual up up Serial0/3/1 192.168.23.2 YES manual down down Vlan1 unassigned YES unset administratively down down
Can you Guys please help me figure out the below:
1) I want to be able to troubleshoot these issues better instead of just deleting and re-creating the Ethernet cables or plugging them back in. I want to be able to look into some log files with meaningful entries that might give a solid hint as to what the issue is instead of trying out fluke restarts. Can you please help me how can I acheive that?
2) I did a lot off googling around and some blogs mention to use "debug condition interface" command, I am however unable to even pull that command up. I tried in multiple IOS 15.1/.4/12.1/.4 and its still the same. I cant even seem to search for the keyword condition, what am I missing here?
Router#debug ? aaa AAA Authentication, Authorization and Accounting custom-queue Custom output queueing eigrp EIGRP Protocol information frame-relay Frame Relay ip IP information ipv6 IPv6 information ntp NTP information ppp PPP (Point to Point Protocol) information standby Hot Standby Router Protocol (HSRP)