Tag: multicast
XenServer and Multicast with IGMP support
Today I tried to add a virtual Terminal Server within a XenServer to a NLB cluster. The current NLB cluster contained only physical servers. When adding the virtual server to the NLB cluster with the NLB manager, the server lost all IP communication. It isn’t possible to connect to or from the server. Together with … Read More
Redundant DMVPN network
Today I looked at the configuration DMVPN (Dynamic Multipoint VPN). A Dynamic Multipoint Virtual Private Network is an enhancement of the virtual private network (VPN) configuration process of Cisco IOS-based routers. DMVPN prevents the need for pre-configured (static) IPsec peers in crypto-map configurations and ISAKMP peer statements. This feature of Cisco IOS allows greater scalability … Read More
Configuration Example, Routing
HSRP and ACL’s
I added a Guest VLAN to a network environment with two multi layer switches running HSRP. To secure the internal network from the Guest VLAN, I added a ACL to the Guest VLAN SVI. The ACL is stated below: ip access-list extended GUEST-DENY-RFC1918 remark Allow DHCP permit udp any eq bootpc any remark Deny RFC … Read More
Cisco Firewall Design and Deployment
The session about firewall design and deployment didn’t reveal a lot of new things about the Cisco ASA appliance or FWSM module. The only new thing for me was the possibility to configure a redundant interface for a Cisco ASA appliance. The screen shot below shows the cabling scheme for an implementation with and without … Read More