Troubleshoot VLANs and Trunks

Bismillah, kembali lagi teman-teman kesempatan kali ini kita akan membahas lesson bagaimana cara troubleshoot pada vlan dan trunk. Ada beberapa jenis masalah pada VLAN dan Trunk berikut kita list dulu macam masalahnya :

1. VLAN Assigment issue
2. Switchport mode issue
3. VACL (VLAN ACL) issue
4. Trunking issue
5. Trunk allowed VLANs issue

OK mungkin hari ini saya akan bahas list no.1 dulu perhatikan topology dibawah ini saya coba pakai Packet Tracer saja biar lebih ringan :

1. VLAN assigment issue

vlan 10 assignment

issue disini pc 10.10.10.1 tidak bisa ping ke 10.10.10.2 padahal secara segment dan kelas mereka berdua satu network, 

C:\>ping 10.10.10.2

Pinging 10.10.10.2 with 32 bytes of data:

Request timed out.

Request timed out.

Request timed out.

Request timed out.

Ping statistics for 10.10.10.2:

Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),

C:\>

tuh kan RTO (Request Time Out), what the problem here ? coba kita cek interface di switch mungkin terjadi down atau port rusak (in real device),

Switch#show ip int br

Interface IP-Address OK? Method Status Protocol

FastEthernet0/1 unassigned YES manual up up

FastEthernet0/2 unassigned YES manual up up 

kedua portnya no issue up semua, step berikut nya kita cek vlan dengan command "show vlan brief" 

perhatikan ternyata port fa0/2 tidak di assign ke vlan 10, ketemu masalahnya

mari kita assign port fa0/2 ke vlan 10 dan kita tes ping apakh masalah solve atau belum,

C:\>ping 10.10.10.2

Pinging 10.10.10.2 with 32 bytes of data:

Reply from 10.10.10.2: bytes=32 time=1ms TTL=128

Reply from 10.10.10.2: bytes=32 time<1ms TTL=128

Reply from 10.10.10.2: bytes=32 time<1ms TTL=128

Reply from 10.10.10.2: bytes=32 time<1ms TTL=128

Ping statistics for 10.10.10.2:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 0ms, Maximum = 1ms, Average = 0ms

ping reply dan issue solved. jika ada pertanyaan silahkan berkomentar dan jangan lupa subcribe blog ini. Big thanks for you all...

Next blog untuk issue kedua...

https://torkisnetwork.blogspot.com/2021/03/troubleshoot-vlans-and-trunks-part-2.html

#ccnpjourney #achievement #2021