icnd1:trunking_and_vlans
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icnd1:trunking_and_vlans [2024/04/28 17:55] 114.119.141.71 old revision restored (2024/02/28 15:23) |
icnd1:trunking_and_vlans [2024/05/14 06:40] (current) 114.119.155.78 old revision restored (2023/09/26 02:01) |
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| ===== Notes ===== | ===== Notes ===== | ||
| - | ISL is largely unsupported | + | ISL is largely unsupported. 802.1Q is the IEEE standard and most adopted. |
| - | 802.1Q is the IEEE standard and most used. Frames are tagged with a VLAN ID field | + | |
| < | < | ||
| + | |||
| + | 802.1Q: | ||
| + | * -Frames are tagged with a VLAN ID Field | ||
| + | * Both ISL and .1Q tag a 12bit VLAN Field | ||
| + | * -Untagged frames are sent to the NATIVE VLAN on the receiving port. | ||
| + | * -It's best practice to have the same NATIVE VLANs set on each side to avoid inconsistencies. | ||
| ===== Configuration ===== | ===== Configuration ===== | ||
| Line 91: | Line 96: | ||
| </ | </ | ||
| + | |||
| + | ===== Command reference ===== | ||
| + | ---- | ||
| + | < | ||
| + | Switch(config-if)# | ||
| + | access | ||
| + | dynamic | ||
| + | trunk Set trunking mode to TRUNK unconditionally | ||
| + | | ||
| + | Switch(config-if)# | ||
| + | auto Set trunking mode dynamic negotiation parameter to AUTO | ||
| + | desirable | ||
| + | </ | ||
| + | < | ||
| + | Switch(config-if)# | ||
| + | |||
| + | Switch#show interfaces trunk | ||
| + | Port Mode | ||
| + | Fa0/ | ||
| + | Gig0/ | ||
| + | |||
| + | Port Vlans allowed on trunk | ||
| + | Fa0/ | ||
| + | Gig0/ | ||
| + | |||
| + | Port Vlans allowed and active in management domain | ||
| + | Fa0/ | ||
| + | Gig0/ | ||
| + | |||
| + | Port Vlans in spanning tree forwarding state and not pruned | ||
| + | Fa0/ | ||
| + | Gig0/ | ||
| + | </ | ||
| + | < | ||
| + | Switch#show vlan brief | ||
| + | |||
| + | VLAN Name | ||
| + | ---- -------------------------------- --------- ------------------------------- | ||
| + | 1 default | ||
| + | Fa0/5, Fa0/6, Fa0/7, Fa0/8 | ||
| + | Fa0/9, Fa0/10, Fa0/11, Fa0/12 | ||
| + | Fa0/17, Fa0/18, Fa0/19, Fa0/20 | ||
| + | Fa0/21, Fa0/22, Fa0/23, Gig0/2 | ||
| + | 2 VLAN0002 | ||
| + | 3 VLAN0003 | ||
| + | 900 ENG active | ||
| + | 990 TEST | ||
| + | 1002 fddi-default | ||
| + | 1003 token-ring-default | ||
| + | 1004 fddinet-default | ||
| + | 1005 trnet-default | ||
icnd1/trunking_and_vlans.1714326932.txt.gz · Last modified: 2024/04/28 17:55 by 114.119.141.71
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