Hi Benoit, On 2/5/15, 8:31 AM, "Benoit Claise (bclaise)" <bcla...@cisco.com> wrote:
>Benoit Claise has entered the following ballot position for >draft-ietf-ospf-ospfv3-autoconfig-13: Discuss > >When responding, please keep the subject line intact and reply to all >email addresses included in the To and CC lines. (Feel free to cut this >introductory paragraph, however.) > > >Please refer to http://www.ietf.org/iesg/statement/discuss-criteria.html >for more information about IESG DISCUSS and COMMENT positions. > > >The document, along with other ballot positions, can be found here: >http://datatracker.ietf.org/doc/draft-ietf-ospf-ospfv3-autoconfig/ > > > >---------------------------------------------------------------------- >DISCUSS: >---------------------------------------------------------------------- > > 4. OSPFv3 interfaces MAY use an arbitrary HelloInterval and > RouterDeadInterval as specified in Section 3. > >Hopefully, an easy DISCUSS. >>From a management point of view, we must be able to determine if a router >or interfaces within a router are OSPF-autoconfigured. >If I'm not mistaken, you miss, in the management considerations section, >something like this: The OSPFv3 routers MUST flag the interfaces >supporting this specification. I will add: OSPFv3 Routers supporting this specification MUST augment mechanisms for displaying or otherwise conveying OSPFv3 operational state to indicate whether or not the OSPFv3 router was autoconfigured and whether or not its OSPFv3 interfaces have been auto-configured. Additionally, we will consider adding a feature to the OSPF YANG model for auto-configuration. > > >Background: I recall one particular tool in the past that would check the >different router configs and flag the HelloInterval and >RouterDeadInterval > mismatched values for adjacent routers. This would be equivalent to the >following debug: >OSPF: Rcv hello from 192.168.0.2 area 0 from FastEthernet0/0 192.168.0.2 >OSPF: Mismatched hello parameters from 192.168.0.2 >OSPF: Dead R 40 C 60, Hello R 10 C 15 Mask R 255.255.255.252 C >255.255.255.252 > >In case of OSPF auto-config, this check doesn't make any sense. This looks like debug messages from a router. Perhaps, this tool simply snoops on OSPF networks and does analysis. Since there is nothing in the packet to indicate auto configuration, there is no way to detect this simply by sniffing. There was a proposal to provide an indicate but it was more complex and offered little additional functionality. Unfortunately, we cannot use 0 for hello-interval since this is used for a proprietary sub-second hello extension implemented by many vendors. Thanks, Acee > > > > _______________________________________________ OSPF mailing list OSPF@ietf.org https://www.ietf.org/mailman/listinfo/ospf
