Victor, Use the EVC alternative. It would allow you to get the flexibility offered by EVC with regards to VLAN number space, L2 services scalability, QOS and many other advanced capabilities.
Arie -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Victor Lyapunov Sent: Tuesday, October 20, 2009 09:54 To: [email protected] Subject: [c-nsp] 7609 DHCP alternatives - EVC / Subinterfaces Hi All I am trying to test DHCP functionality with 7600 router. Traffic arrives from all customer facing interfaces (ES+), arrive using the same VLAN. 7600 perfoms DHCP relay and acts as a gateway for all of them. With the new cards ES+ we have two options for the configuration of customer facing interfaces 1. Using EVC + SVI interface int g4/1 service instance 100 ethernet encapsulation dot1q 100 rewrite ingress tag pop 1 symmetric bridge-domain 100 split-horizon int g4/2 service instance 100 ethernet encapsulation dot1q 100 rewrite ingress tag pop 1 symmetric bridge-domain 100 split-horizon int Vlan 100 ip address 10.0.0.1 255.255.255.0 ip helper address 192.168.0.1 2. Using IP subinterfaces int loopback 100 ip address 10.0.0.1 255.255.255.0 int g4/1.100 encapsulation dot1q 100 ip address unnumbered loopback 100 ip helper address 192.168.0.1 int g4/2.100 encapsulation dot1q 100 ip address unnumbered loopback 100 ip helper address 192.168.0.1 Both configurations seem to achieve the same effect but I am not sure which one is the preferable for large amount of traffic / subscribers. For example due to the bridge domain I would expect that the first alternative will create more entries in the mac-address table. Thanx Victor _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
