CCNP TSHOOT CHAPTER 1 (VLAN)

CCNP TSHOOT CHAPTER 1 (VLAN)
1.What are troubleshooting steps for vlan .
Solution:
-->
- show vlan brief
- show int fa0/1
- sh vlan id 100
- sh inter fa0/1 switchport

-->
SW8#sh vlan brief

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Fa1/0/1, Fa1/0/2, Fa1/0/3
                                                Fa1/0/4, Fa1/0/5, Fa1/0/6
                                                Fa1/0/7, Fa1/0/8, Fa1/0/9
                                                Fa1/0/10, Fa1/0/11, Fa1/0/12
                                                Gi1/0/1, Gi1/0/2, Gi1/0/3
                                                Gi1/0/4
10   VLAN0010                         active

to check witch ports are associated with the VLAN10.

SW8#sh int fa1/0/4
FastEthernet1/0/4 is administratively down, line protocol is down (disabled)
  Hardware is Fast Ethernet, address is 000f.f72c.c606 (bia 000f.f72c.c606)
  MTU 1504 bytes, BW 10000 Kbit, DLY 1000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Auto-duplex, Auto-speed, media type is 10/100BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
 
to check port is admin down/ status of line protocol.

SW8#sh vlan id  10

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
10   VLAN0010                         active

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
10   enet  100010     1500  -      -      -        -    -        0      0

suppope is we shut down vlan 11 & then take the output:

SW8#sh vlan id 11

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
11   VLAN0011                         act/lshut

VLAN Type  SAID       MTU   Parent RingNo BridgeNo Stp  BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
11   enet  100011     1500  -      -      -        -    -        0      0


it will show status as act/lshut.

SW8#sh interfaces fastEthernet 1/0/1 switchport | ex private|Unknown
Name: Fa1/0/1
Switchport: Enabled
Administrative Mode: dynamic desirable
Operational Mode: down
Administrative Trunking Encapsulation: negotiate
Negotiation of Trunking: On
Access Mode VLAN: 1 (default)
Trunking Native Mode VLAN: 1 (default)
Administrative Native VLAN tagging: enabled
Voice VLAN: none
Trunking VLANs Enabled: ALL
Pruning VLANs Enabled: 2-1001
Capture Mode Disabled
Capture VLANs Allowed: ALL

Protected: false
Appliance trust: none

This will give you handful of information .