<div class="jive-rendered-content"><p>Hello community,</p><p>I have been struggling with a nice IPv6 BGP problem.</p><p>I
am using my route reflectors (CER-RT, v5.3.0b) to generate the BGP
prefixes we will be announcing to our upstreams via our edge routers
(MLXe-4, v5.3.0b).</p><p>The
configuration works just fine for IPv4, but for some reason, my BGP
communities are not propagated when using the same model under IPv6 AFI.</p><p>Some outputs :</p><p>- I can see that the RR is generating the prefixe, annoucing it to the ER and taging it with the right BGP community :</p>
<p style="min-height:8pt;height:8pt;padding:0px"> </p><p>SSH@rr01.par01#sh ipv6 bgp routes detail </p><p>Total number of BGP Routes: 1</p><p>Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED</p><p> E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH m:NOT-INSTALLED-MULTIPATH</p>
<p> S:SUPPRESSED F:FILTERED s:STALE</p><p>1 Prefix: 2a00:bf40::/32, Status: BL, Age: 0h4m29s</p><p> NEXT_HOP: 100::1, Learned from Peer: Local Router</p><p> LOCAL_PREF: 100, MED: 1, ORIGIN: igp, Weight: 32768</p>
<p> AS_PATH: </p><p> <strong>COMMUNITIES: 57928:106</strong></p><p> Adj_RIB_out count: 3, Admin distance 1</p><p> Tag: 0x0000006a</p><p style="min-height:8pt;height:8pt;padding:0px">
</p><p>-
The ER receives the BGP announcement and installs in its RIB. But for
some reason, BGP community has disappeared along the way :</p><p>er01.par01#sh ipv6 bgp routes detail </p><p>Total number of BGP Routes: 1</p><p>Status A:AGGREGATE B:BEST b:NOT-INSTALLED-BEST C:CONFED_EBGP D:DAMPED</p><p>
E:EBGP H:HISTORY I:IBGP L:LOCAL M:MULTIPATH m:NOT-INSTALLED-MULTIPATH</p><p> S:SUPPRESSED F:FILTERED s:STALE</p><p>1 Prefix: 2a00:bf40::/32, Status: BI, Age: 0h2m11s</p><p> NEXT_HOP: 100::1, Metric: 1, Learned from Peer: 2a00:bf40::1 (57928)</p>
<p> LOCAL_PREF: 100, MED: 1, ORIGIN: igp, Weight: 0</p><p> <strong>AS_PATH:</strong> </p><p style="min-height:8pt;height:8pt;padding:0px"> </p><p>-
I, of course, have activated the propagation of BGP communities under
the RR's BGP configuration (showing only what's relevant) :</p><p>router bgp</p><p>....</p><p> neighbor ER-PEER-V6 peer-group</p><p> neighbor ER-PEER-V6 remote-as 57928</p><p> neighbor ER-PEER-V6 description EDGE-ROUTERS-PEERS-V6</p>
<p> neighbor ER-PEER-V6 update-source loopback 1</p><p> neighbor ER-PEER-V6 soft-reconfiguration inbound</p><p>....</p><p> neighbor 2a00:bf40::XYZ peer-group ER-PEER-V6</p><p> neighbor 2a00:bf40::XYZ peer-group ER-PEER-V6</p>
<p>....</p><p style="min-height:8pt;height:8pt;padding:0px"> </p><p> address-family ipv6 unicast</p><p> redistribute static route-map FROM-STATIC-V6-TO-BGP</p><p><strong> neighbor RR-PEER-V6 send-community</strong></p><p>
neighbor 2a00:bf40::XYZ activate </p><p> neighbor 2a00:bf40::XYZ activate </p><p> exit-address-family</p><p style="min-height:8pt;height:8pt;padding:0px"> </p><p>No filters, ACLs or route-maps of any kind.</p><p>Any ideas ?</p>
<p style="min-height:8pt;height:8pt;padding:0px">Best regards. <br></p><p>Y.</p></div><br>-- <br>Youssef BENGELLOUN-ZAHR<br><br>