Thank you all for your replies!
For James's question, you can limit number of communities a route can be tagged by matching "community-count" http://www.juniper.net/techpubs/en_US/junos15.1/topics/example/policy-community-count.html user@R1# *show policy-options* policy-statement import-communities { term 1 { from { protocol bgp; community-count 5 orlower; } then accept; } term 2 { then reject; } } On Tuesday, August 23, 2016, James Bensley <[email protected]> wrote: > On 23 August 2016 at 13:40, Olivier Benghozi > <[email protected] <javascript:;>> wrote: > > And about a limitation to 10 communities: > > I've seen that on SEOS (Redback/Ericsson OS for SmartEdge routers) when > using "set community" in a route-map. This is a ridiculous arbitrary > limitation, of course. > > > > Hopefully the limitation was only in the CLI, not in the BGP code > itself. So the workaround was to use the route-map "continue" command like > in a BASIC GOTO structure to add more communities in additional route-map > entries (with set community additive - these are Cisco-like commands). > > > >> Le 23 août 2016 à 14:03, Alexander Arseniev <[email protected] > <javascript:;>> a écrit : > >> > >> In BGP messages, a regular community is encoded in 7 bytes, and > extended one in 11 bytes. > >> > >> Max BGP message size is 4096 bytes - this sets a limit for regular > communities number to about 4K/7=570, and for extended communities to about > 4K/11=360, if You consider the minimal mandatory information that has to be > there apart from communities. > >> > >> > >> On 23/08/2016 03:18, Huan Pham wrote: > >>> > >>> I remember hitting a limit on a number of communities (something like > 10 or > >>> so) on a platform (can not remember which one from which vendor). So I > >>> believe that there is a hard limit a platform or OS can support. > >>> > >>> I test this in the lab and found no problem with tagging 100 > communities. > >>> > >>> Is there a maximum number of communities that Junos can tag to a > route? If > >>> yes, then what it is? Thanks. > > > Hi, > > Hopefully not completely hijacking this thread; I'm interested to know > if there is a way I can limit a peer to a maximum number of > communities? > > > Cheers, > James. > _______________________________________________ > juniper-nsp mailing list [email protected] <javascript:;> > https://puck.nether.net/mailman/listinfo/juniper-nsp _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
