Portfast on trunks
WebEnables PortFast on an access port that is connected to a single workstation or server. By specifying the trunk keyword, you can enable PortFast on a trunk port. Note. To enable … WebAlso 'spanning-tree portfast' applies to the first config, to support portfast/edge ports on a trunk you need to use the not-so-well-known 'spanning-tree portfast trunk' command. And the global spanning-tree portfast configuration supports access ports with voice vlan, but not trunked interfaces. – cpt_fink Feb 17, 2015 at 7:59 Add a comment
Portfast on trunks
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WebJul 9, 2010 · spanning-tree portfast! interface FastEthernet0/22 switchport mode dynamic desirable spanning-tree portfast! interface FastEthernet0/23 switchport mode access spanning-tree portfast! interface FastEthernet0/24 switchport trunk encapsulation dot1q switchport mode trunk spanning-tree portfast! interface FastEthernet0/25 switchport … WebFeb 2, 2011 · Portfast enables a port to skip LIS, LRN states of STP and transition directly from BLK to FWD mode. This saves convergence time on this port and the device …
WebThe best way to do this is set the "portfast default" command at global config level, this will make all access mode ports operate in portfast mode unless specified. It will not change the behavior of trunk mode ports so it's relatively safe and won't affect trunks between switches. WebEnable Port Fast on an access port connected to a single workstation or server. By specifying the trunk keyword, you can enable Port Fast on a trunk port. Note To enable Port Fast on trunk ports, you must use the spanning-tree portfast trunk interface configuration command. The spanning-tree portfast command does not work on trunk ports.
WebAlso, worth noting on the topics of trunks and portfast, keep in mind that for trunk port that interface with routers or an ESX host that doesn't participate in spanning-tree, you should enable "spanning-tree portfast trunk" manually as there is no global setting for this and I see this forgotten or missed in a lot of implementations.
WebEnabling the PortFast feature causes a switch or a trunk port to enter the STP Spanning Tree Protocol. STP is a network protocol that builds a logical loop-free topology for Ethernet networks. forwarding-state immediately or upon a linkup event, thus bypassing the listening and learning states. The PortFast feature is enabled at a port level ...
WebJul 5, 2024 · Hi, Unfortunately I cleared the config of the HP switch and put back in the old switch after half an hour of scratching my head . So what you're saying is create a (HP style trunk which means something completely diffferent to a cisco trunk) trunk on the HP and add all the vlans present on the core switch to that trunk and tag them except the vlan 90 … sigalert 15 southWebFeb 11, 2024 · Switch (config-if)# spanning-tree portfast trunk Enables edge behavior on a Layer 2 access port connected to an end workstation or server. (Optional) trunk—Enables edge behavior on a trunk port. Use this keyword if the link is a trunk. Use this command only on ports that are connected to end host devices that terminate VLANs and from which ... sigal constructionWebApr 24, 2024 · PortFast PortFast immediately brings an interface configured as an access or trunk port to the forwarding state from a blocking state, bypassing the listening and learning states. Figure 1. PortFast-Enabled Interfaces. sigal ehrlich booksWebThere is no configuration command to enable PortFast solely on operational trunk ports. S1 (config)#interface eth0/2 S1 (config-if)#no spanning-tree portfast S1 (config-if)#spanning … sigalert 10 freeway eastWebI noticed today that there is a Portfast Trunk command. I looked into it and it is used if you want to trunk down to a single physical device. It makes sense now we use virtual machines more and more so the VM can sit on a separate VLAN from the host machine. What would happen if I enable this on a trunk that connects to another switch? the prefix that means betweenWebApr 2, 2024 · To enable PortFast on trunk ports, you must use the spanning-tree portfast trunk interface configuration command. The spanning-tree portfast command will not work on trunk ports. Make sure that there are no loops in the network between the trunk port and the workstation or server before you enable PortFast on a trunk port. the prefix therm- or thermo- refers toWebThe reason why the port is not going to forwarding is becuase Portfast has two variants, one for access ports and one for trunks. In order to enable Portfast on trunk ports you should enter the "spanning-tree portfast trunk" command on interface mode. Additional note: Portfast has a built in protection mechanism to avoid loops. sigal check up