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Results tagged with trunk
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user 39019
For questions about trunks, layer-2 links across which traffic for multiple VLANs travel.
9
votes
Accepted
Portfast on Trunk port
Be sure to know the difference between spanning-tree portfast and spanning-tree portfast trunk for classic IOS switches, respectively spanning-tree port type edge and spanning-tree port type edge trunk … If you configure switchport mode trunk for an edge device, you have to include the trunk keyword in the portfast command, too. …
- 8,876
2
votes
Management switch as a medium only
I might be mistaken, but from what I understand from the problem description, this might be a case for QinQ.
one service provider VLAN per customer.
edge ports of the service provider VLAN are (in C …
- 8,876
5
votes
Accepted
How can I set the switchport's trunk protocol?
Just set switchport mode trunk. … If the switchport won't accept switchport mode trunk, then setting the trunking encapsulation is probably needed. …
- 8,876
2
votes
Accepted
Partitioning between VLAN in a Trunk switch architecture
and switchport trunk allowed vlan <myListOfVlans>). … After all, if a 802.1q trunk to a server/computer may not contain VLANs of different security zones, why should a trunk between two switches be allowed to? …
- 8,876
3
votes
Accepted
Removing VLANs from core trunks (.1q)....?
switchport trunk allowed vlan all might be the way forward to get from a restricted 802.1q trunk to an unrestricted one ("unrestriced" as in: all VLANs allowed), without having to worry about some vlans … Things might go awfully wrong when you inadvertently enable non-VPC-VLANs on a trunk where they're not meant to be . …
- 8,876
8
votes
Accepted
spanning-tree port type edge trunk on port-channel vs physical interface
Also: Having portfast (port type edge [trunk]) on a member interface but not on the port-channel interface will result in the dreaded 30seconds of LIS/LRN (for STP) or LRN (for RSTP and RPVST+), before …
- 8,876
2
votes
Communication between different VLANs
All these statements are incorrect or at least wildy incomplete.
1.VLANs can communicate with other VLANs when they both use the same trunk link to connect to the same layer 2 switch.
No. … VLAN separation on the local switch is the same as it is on a remote switch beyond a 802.1q trunk link. …
- 8,876