[dev] [frr] 2 MPLS Questions
Lou Berger
lberger at labn.net
Wed Apr 5 08:40:44 EDT 2017
Hi Marc,
On 3/27/2017 4:30 PM, Marc Sune wrote:
> In regular MPLS processing (no SR), does FRR currently support
> advertising any label other than implicit NULL for MPLS traffic
> termination(itself)? And for L2VPNs?
>
If you're using the BGP RFAPI, labels can be provided as a VN option
during registers (from rfapi.h: struct
rfapi_l2address_option/RFAPI_VN_OPTION_TYPE_L2ADDR) . Here's a code sample:
rfapi_register_action action;
struct rfapi_vn_option vo;
struct rfapi_l2address_option *l2o = NULL;
action = (add ? RFAPI_REGISTER_ADD : RFAPI_REGISTER_WITHDRAW);
memset (&vo, 0, sizeof (vo));
vo.type = RFAPI_VN_OPTION_TYPE_L2ADDR;
l2o = &vo.v.l2addr;
l2o->macaddr = <mac|0=IP+label>;
l2o->label = <label>;
l2o->logical_net_id = <EVPN Ethernet Segment Id>//must be > 0 for L2
mac registration
l2o->local_nve_id = (uint8_t) <0|redundant_port_id>
l2o->tag_id = <0=default|2 bytes copied to additional RT>
return rfapi_register (rfd, prefix, lifetime,
NULL,
&vo, action);
Also there is some related (optional) configuration, see the VNC L2
configuration manual section
(http://labn.net/frr.html/VNC-L2-Group-Configuration.html#VNC-L2-Group-Configuration)
Lou
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