CCNP ROUTE 2.0: IP Helper Address, Debug IP Packet, Identifying Memory Issues & Core Dumps

IP Helper Address Command

Routers or Multilayer Switches cannot forward broadcasts, but enabling the IP Helper Address command allows it to forward UDP broadcasts and forward them as a unicast to the address specified. The command “ip helper-address” must be configured on the interface/VLAN receiving the broadcasts. On a MLS for all users in VLAN 10 then the IP Helper Address must be configured on the VLAN SVI.


interface vlan 10
ip helper-address 10.10.10.1
Continue reading “CCNP ROUTE 2.0: IP Helper Address, Debug IP Packet, Identifying Memory Issues & Core Dumps”

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Configuring DHCP Snooping on HP ProCurve Switches

DHCP snooping is a security feature that provides security by filtering untrusted DHCP messages. DHCP snooping functions when all DHCP servers connected to the switch are configured as trusted interfaces, when a rogue DHCP server is connected to untrusted interface DHCP snooping will drop the DHCP packets.

This post describes configuration of DHCP snooping on an HP ProCurve 2610 switch.

Configuring DHCP Snooping

 

Configure the VLAN with an IP Helper Address for the DHCP Server

vlan 1

ip helper-address 192.168.20.20

Enable DHCP Snooping globally on the switch

dhcp-snooping

Enable DHCP Snooping on the required VLANs

dhcp-snooping vlan 1-40

Continue reading “Configuring DHCP Snooping on HP ProCurve Switches”