Core switch blocks IP access

Tlaletso Global Photonics (TGO) designs and manufactures laser diodes, VCSEL, DFB lasers, laser drivers, CDR circuits, optical modulators, TIAs, co-packaged optics, silicon photonics, linear drive plu...
Contact online >>

HOME / Core switch blocks IP access - Tlaletso Global Photonics

Switch ACLs: how to config ACL to permit internet access but restrict

We have some devices (security cameras, security keypads, backup/archival servers) that need to have internet access (IoT-style dashboards, updates, etc) but I need to restrict access to

View more

Internet Connection Termination: Core Switch vs Firewall

When you terminate on the core switches, any maintenance or config changes on the network can nuke your internet connection. This is especially true if the core is substantial and gets regular config

View more

Core Switch vs. Distribution Switch vs. Access Switch

What is a Core Switch? A core switch is the primary switch installed at the backbone of a layered or hierarchical network. These data switches are responsible for routing and data switching at the core

View more

ACL to block management on all but one VLAN interface

Our core switch handles all our VLAN interfaces and you can telnet to the switch using any one of the VLAN interface IP addresses. I would like to lock this down so that you can only access

View more

ISP Hooked Up to Core Switch First... Instead of Straight to The

Double check that there''s no IP address on VLANs 17&18, and then routing (L3 connectivity) isn''t likely to exploit the switch somehow without hacking either your firewall, or the ISP''s CPE equipment at

View more

Internet not reaching Core/Access Switch

when you ping 8.8.8.8 from 172.30.235.2 (the switch) and then issue the command ''show ip nat translation *" on the router, do you actually see an entry for 172.30.235.2 ?

View more

Block and Allow internet access for VLAN in switches sitting behind

We have configured additional VLAN in our cisco core switches sitting behind PA FW. I want to allow and block internet in certain VLAN, eg VLAN7 to allow and VLAN70 in the switches to

View more

Deny access from other VLANs / Allow internet

If your switch supports reflexive acls that would be the way to go. If not then you have a problem because acls are not stateful which means if you deny traffic from vlans 10/20 to vlan 30

View more

Core to access switch ping working and access to core is not pinging

Look for me Access switch do not aware the IP coming from Core switch to reach back. so make sure Access switch aware routing setup correctly using ip route command.

View more

Solved: Block specific subnet in core switch

I''m new to the Cisco experience so I''m wondering how I can block traffic only in my x.x.30.x subnet from passing through my core switch. All traffic in other subnets must continue to be

View more

Laser Diodes & VCSEL

High-power CW/pulsed laser diodes (808nm–1550nm) and VCSEL arrays for 3D sensing, LIDAR, and optical interconnects.

Silicon Photonics & CPO

Co-packaged optics engines, silicon photonics ICs, and optical I/O solutions for high-density switches and AI clusters.

Optical Transceivers & AOCs

400G/800G QSFP-DD/OSFP modules, active optical cables, and custom optical engines for data center interconnects.

Laser Drivers & CDR

Low-jitter laser drivers, integrated CDR circuits, and linear TIAs for coherent optics and short-reach links.

Photonics Insights & Technical Resources

Contact Tlaletso Global Photonics

We provide custom laser diodes, VCSEL arrays, DFB lasers, drivers, CDR, modulators, TIAs, co-packaged optics, silicon photonics, LPO, transceivers, and AOCs.
From prototype to mass production, our team ensures premium quality and technical support.

23 Photonics Avenue, Techno Park, Stellenbosch, 7600, South Africa

+27 63 148 2975  |  +27 63 148 2975  |  [email protected]