Mach and Sue, One more question about SFC-Use-REQ07:
SFC-Use-REQ07 (IC): Virtual Network Topology (VNT) which includes: * number of access points to which service topology applies * topology of access points Does the "Virtual Network Topology" in SFC-Use-REQ07" mean the "Topology of Service Function Forwarder Nodes"? If yes, suggest to change the text to: SFC-Use-REQ07 : Service Function Forwarder Topology Which includes: * The number of SFF nodes * Topology of the SFF nodes If not, what is this "Virtual Network Topology" ? Linda From: Linda Dunbar Sent: Wednesday, February 25, 2015 1:16 PM To: 'Susan Hares'; Mach Chen; [email protected] Subject: Questions & suggestions to draft-ietf-i2rs-usecase-reqs-summary-00 Mach and Sue, I have some questions and suggestions for the Section 7: Req from SFC Use Cases: - SFC-US-REQ01: o Is the "service node" here mean "Service Function" Node? Why need the " host system" address? Is "host system address " the Server address When multiple service functions are instantiated on the server? Then the "Server" address is not referenced by Forwarding node. Why need here? o It makes more sense to have "Service Node Address & Service Function Index" tuple to cover the case of one service node having multiple service functions instantiated. - SFC-USE-REQ02: o SF type should be "Vendor & SF name". FW by different vendors have different functionalities. Same goes IP Firewall, LB, etc. - SFC-USE-REQ03: o What is the "virtual contexts" for? Is the "Virtual Context" here mean the same as NVo3's "virtual context", i.e. the "Virtual Network Identifier"? I think Routers have to expose which fields that routers are capable of steering. For example, - Steering packets based on L2 Layer: MPLS label, MAC destination, MAC source, VID, EtherType - Steering packets based on any field of GRE header, VxLAN header, .. - Steering packets based on L3 Layer: IP destination, IP Source, protocol code, ... - Steering packets based on L4 fields: TCP port, UDP port - Steering packets based on ingress port, - Steering packets based on any bits in the packet - Steering packets based on packet size, - Steering packets based on time of the day, Linda
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