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https://community.cisco.com/t5/ip-telephony-and-phones/vg224-redundancy-loopback-vs-bvi/td-p/1343788
For the Loopback address, you can enter a Loopback address. VG224 does not support EIGRP, it does seem to support RIP and OSPF. RIP could cost you a subnet to have a loopback (not sure if v2 is supported). So please make sure it.
https://www.cisco.com/c/en/us/support/docs/wireless/aironet-340-series/8117-connectivity.html
Jul 11, 2007 · Aironet APs and bridges do not support the configuration of loopback interfaces. Even though the command-line interface (CLI) allows you to create a loopback interface, avoid the configuration of loopback interfaces on APs and bridges.
https://community.cisco.com/t5/networking-documents/spanning-tree-loop-troubleshooting-and-safeguards/ta-p/3115040
Problem Description: A bridging loop or spanning tree loop caused a network outage. To break the loop you've pulled one of the redundant links or shut down one of the switches that are participating in the loop but now you're unsure of what to do to both find the source of …
https://community.cisco.com/t5/switching/ports-do-not-support-bridging/td-p/3215766
Nov 13, 2017 · To do this I was going to bridge 4 ports together. I attempted this with the 2 ports that the 1941w router comes with and that was successful. When I try the same thing with the new ports it will say that it does not support bridging.
https://community.cisco.com/t5/server-networking/is-loopback-interface-on-router-mandatory-for-dlsw/td-p/170913
In your case, it does not really matter if you use the loopback or ethernet interface. As there is only two interfaces (I assume. A WAN interface and an ethernet interface), you enable transparent bridging on the ethernet interface. If the ethernet interface goes down, the router …
https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5xx/interfaces/63x/b-interfaces-hardware-component-cg-63x-ncs540/b-interfaces-hardware-component-cg-ncs5500-63x_chapter_0110.html
Jul 18, 2019 · The BVI is a virtual interface within the router that acts like a normal routed interface. The BVI does not support bridging itself, but acts as a gateway for the corresponding bridge-domain to a routed interface within the router.
https://www.cisco.com/cisco/web/support/olh/Sx300/1.3.5/en/NK_Configuring_IP_Information03.html
A loopback interface does not support bridging; it cannot be a member of any VLAN, and no layer 2 protocol can be enabled on it. The IPv6 link-local interface identifier is 1. When the switch is in Layer 2 system mode, the following rules are supported:
https://www.cisco.com/c/en/us/td/docs/routers/asr920/configuration/guide/ce/b_layer2_ASR920/configuring-ethernet-data-plane-loopback.html
Sep 13, 2019 · Egress QoS for facility loopback does not work due to the platform restriction. Facility loopback behavior on Gibraltar: Ingress and egress QoS policies on the EFP/TEFP gets bypassed. There is no support to bypass Ingress/Egress Port level policies as it works as configured.
https://community.cisco.com/t5/switching/bridging-loops-stp-protection/td-p/1838851
Loops are generated and many uplinks are shut down in err-disable state due to the loopback reason. I know I could discourage the use of those mini-switches using port security. I even have NAC (cisco) deployed on the network, but there are cases where that mini-switches are allowed by the managment.
https://www.cisco.com/c/en/us/td/docs/iosxr/ncs5500/interfaces/61x/b-ncs5500-interfaces-configuration-guide-61x/b-ncs5500-interfaces-configuration-guide-61x_chapter_01100.html
Nov 14, 2019 · The BVI is a virtual interface within the router that acts like a normal routed interface. The BVI does not support bridging itself, but acts as a gateway for the corresponding bridge-domain to a routed interface within the router.
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