What is Cisco IP source guard? About IP Source Guard IP Source Guard is a per-interface traffic filter that permits IP traffic only when the IP address and MAC. address of each packet matches one
What is Cisco IP source guard?
About IP Source Guard IP Source Guard is a per-interface traffic filter that permits IP traffic only when the IP address and MAC. address of each packet matches one of two sources of IP and MAC address bindings: • Entries in the Dynamic Host Configuration Protocol (DHCP) snooping binding table.
Is Cisco 3550 a Layer 3 switch?
The Cisco 3550 series is the most cost-effective used option for a true Cisco layer 3 switch. These switches do most of the typical layer 2 features of modern Cisco switches, plus they support layer 3 forwarding, the configuration of layer 3 switching, and support for a variety of IP routing protocols.
What is IP source guard in networking?
IP Source Guard is a security feature that restricts IP traffic on untrusted Layer 2 ports by filtering traffic based on the DHCP snooping binding database or manually configured IP source bindings. This feature helps prevent IP spoofing attacks when a host tries to spoof and use the IP address of another host.
What does IP source guard protect against?
IP Source Guard prevents IP and/or MAC address spoofing attacks on untrusted layer two interfaces. When IP source guard is enabled, all traffic is blocked except for DHCP packets. Once the host gets an IP address through DHCP, only the DHCP-assigned source IP address is permitted.
What is IP verify source?
Enables IP Source Guard to add a higher level of security to the desired port by preventing IP spoofing.
Can Layer 3 switch route between VLANs?
Capabilities of a Layer 3 switch include the ability to do the following: Route from one VLAN to another using multiple switched virtual interfaces (SVIs). Convert a Layer 2 switchport to a Layer 3 interface (that is, a routed port).
Does Cisco 3550 support Poe?
The Cisco Catalyst 3550 Series Switches are standalone, Layer 3 fixed-configuration switches featuring either Fast Ethernet or Gigabit Ethernet connectivity, with Cisco Power over Ethernet functionality.
What is IP verify?
What is Verification IP? Verification IP (VIP) blocks are inserted into the testbench for a design to check the operation of protocols and interfaces, both discretely and in combination. Most standard protocol and interface IP enables verification engineers to check basic features, such as system start-up.
What does IP verify source do?
Use ip verify source to enable the IPv4 source guard function on a port and specify the elements to be included in the port’s dynamic binding entries. Use undo ip verify source to restore the default. By default, the IPv4 source guard function is disabled on a port. Related commands: display ip source binding.
What is option 82?
Option 82 is called the relay agent information option and is inserted by the DHCP relay agent when forwarding client-originated DHCP packets to a DHCP server. The routing switch can operate as a DHCP relay agent to enable communication between a client and a DHCP server on a different subnet.
What is IP ARP inspection?
Dynamic ARP inspection (DAI) is a security feature that rejects invalid and malicious ARP packets. The feature prevents a class of man-in-the-middle attacks, where an unfriendly station intercepts traffic for other stations by poisoning the ARP caches of its unsuspecting neighbors.
What are the security features of IP source guard?
This chapter describes Layer 2 security basics and security features on switches available to combat network security threats. IP Source Guard is a security feature that restricts IP traffic on untrusted Layer 2 ports by filtering traffic based on the DHCP snooping binding database or manually configured IP source bindings.
How to enable IP source guard in Cisco Catalyst?
Enabling IP Source Guard 1 Enters the global configuration mode. 2 Specifies the interface to be configured, and enters interface configuration mode. 3 Enables IP source guard with source IP address filtering. 4 Returns to global configuration mode. 5 Adds a static IP source binding. 6 Returns to privileged EXEC mode.
How does the Cisco Catalyst 3850 switch work?
The Catalyst 3850 switch uses a source IP lookup table in hardware to bind IP addresses to ports. For IP and MAC filtering, a combination of source IP and source MAC lookups are used. IP traffic with a source IP address is the binding table is allowed, all other traffic is denied.
How does IP source guard work with DHCP?
Any IP traffic coming into the interface with a source IP address other than that assigned (via DHCP or static configuration) will be filtered out on the untrusted Layer 2 ports. The IP Source Guard feature is enabled in combination with the DHCP snooping feature on untrusted Layer 2 interfaces.