Switching

I just want to know does a port of a switch in Blocking State(Alt.) process the bpdu's?? Like in this given forum https://community.cisco.com/t5/switching/stp-indirect-topology-change/td-p/2202906When SW3(R3) apparently received a inferior bpdu on it...

Just a simple question why it's recommended to use both Portfast and BPDU Guard together apart from the very fact that both should be used in access switches ports connecting to end users?? Like BPDU Guard will still work if I don't have portfast con...

Hello, I've setup a lab as the attached diagram.  A1 & A2 run vPC.  B1 & B2 run vPC.  A & B run VxLAN with OSPF as underlay.  When HSRP is used in A1 & A2, Laptop A is able to ping 192.168.253.1.  However, when I change the HSRP to anycast gateway, L...

Hi guys!We just got a Cisco C9500-48Y4C. We gonna mainly use is as our Core Switch for ST2110 and AES67 traffic.We got an external PTPv2 Grandmaster. The Cisco switch should work as PTP boundary clock.Unfortunately it seems like Cisco only supports P...

Both portfast in STP and edge port feature in RSTP is used to skip the listening and learning stages for access ports... I know both are configured using the same command.... Then what is the actual difference between them?  

Hi,  I have been trying to get a virtual IP address (Vlan 13 Gateway) to route out the internet.Everything is working fine from Sw1 and 2 as far as connectivity to the internet is concerned.SW3 gets DHCP addresses assigned fine and can ping everythin...

Hello all,A couple of days ago I installed a ProxMox server on a Thinkserver to experiment and deploy some containers and VMs. The server has two network ports, so it seemed a good idea to aggregate the two network ports into an aggregated link. I wa...

I'm working with a Catalyst C9500-32C on version 17.1.1. I have a QSFP-4SFP25G-CU5M module in port 2(the port is breakout enabled). Cisco Optics-to-Device Compatibility Matrix shows that QSFP-4SFP25G-CU5M is compatible with C9500-32C on version 17.1....

In 17.18.2, configuring "ip arp inspection rate limit <x> burst interval <y>" will be accepted and change the runtime configuration, but it will not be reflected in running config or startup config. If you upgrade to 17.18.2 and it was present in the...

I'm using the rip protocol now, is there a better alternative to OSPF? How do I write it without OSPF? router rip version 2 network 3.0.0.0 network 4.0.0.0 network 10.2.2.0 0.0.0.255 network 10.2.3.0 0.0.0.255 network 10.10.40.0 0.0.0.255 network 10....

Hi, I need to confirm please if the SFPs GLC-LH-SM & GLC-SX-MM would be compatible with the new Catalyst 9000 switches, such as the 9200, 9300 & 9400 with its modules? Since the newer models GLC-LH-SMD & GLC-SX-MMD are compatible with these switches ...

So, I was watching this video about topology change by Jeremy's IT Lab where he mentioned this point in the topology that Sw3 will sends a tcn to to sw1 (generated by sw4) and tcack to sw4. So, does it mean that a switch receiving tcn from other swit...

So, in a topology like three switches connected with each other. Only the root bridge generates CBPDU. So  after shutting down sw3's it's e0/0(rp) link as per the rules SW3 will generate TCN and the root(sw1) should generate a cbpdu with tc ack flag ...