IS
pathfinder
Size: a a a
2020 March 18
Y
ниссан?
IS
Yaroslav
это гдето написано? есть ссыль?
DF Election Procedure
The default procedure for DF election at the granularity of the ESI and EVI is referred to as service carving. With service carving, it is possible to elect multiple DFs per Ethernet segment (one per EVI) in order to perform load-balancing of multidestination traffic destined for a given Ethernet segment. The load-balancing procedures carve up the EVI space among the PE nodes evenly, in such a way that every PE is the DF for a disjoint set of EVIs.
The procedure for service carving is as follows:
When a PE router discovers the ESI of the attached Ethernet segment, it advertises an autodiscovery route per Ethernet segment with the associated ES-import extended community attribute.
The PE router then starts a timer (default value of 3 seconds) to allow the reception of the autodiscovery routes from other PE nodes connected to the same Ethernet segment. This timer value must be the same across all the PE routers connected to the same Ethernet segment.
The default wait timer can be overwritten using the designated-forwarder-election hold-time configuration statement.
When the timer expires, each PE router builds an ordered list of the IP addresses of all the PE nodes connected to the Ethernet segment (including itself), in increasing numeric order. Every PE router is then given an ordinal indicating its position in the ordered list, starting with 0 as the ordinal for the PE with the numerically lowest IP address. The ordinals are used to determine which PE node is the DF for a given EVI on the Ethernet segment.
The PE router that is elected as the DF for a given EVI unblocks traffic for the Ethernet tags associated with that EVI. The DF PE unblocks multidestination traffic in the egress direction toward the Ethernet segment. All the non-DF PE routers continue to drop multidestination traffic (for the associated EVIs) in the egress direction toward the Ethernet segment.
The default procedure for DF election at the granularity of the ESI and EVI is referred to as service carving. With service carving, it is possible to elect multiple DFs per Ethernet segment (one per EVI) in order to perform load-balancing of multidestination traffic destined for a given Ethernet segment. The load-balancing procedures carve up the EVI space among the PE nodes evenly, in such a way that every PE is the DF for a disjoint set of EVIs.
The procedure for service carving is as follows:
When a PE router discovers the ESI of the attached Ethernet segment, it advertises an autodiscovery route per Ethernet segment with the associated ES-import extended community attribute.
The PE router then starts a timer (default value of 3 seconds) to allow the reception of the autodiscovery routes from other PE nodes connected to the same Ethernet segment. This timer value must be the same across all the PE routers connected to the same Ethernet segment.
The default wait timer can be overwritten using the designated-forwarder-election hold-time configuration statement.
When the timer expires, each PE router builds an ordered list of the IP addresses of all the PE nodes connected to the Ethernet segment (including itself), in increasing numeric order. Every PE router is then given an ordinal indicating its position in the ordered list, starting with 0 as the ordinal for the PE with the numerically lowest IP address. The ordinals are used to determine which PE node is the DF for a given EVI on the Ethernet segment.
The PE router that is elected as the DF for a given EVI unblocks traffic for the Ethernet tags associated with that EVI. The DF PE unblocks multidestination traffic in the egress direction toward the Ethernet segment. All the non-DF PE routers continue to drop multidestination traffic (for the associated EVIs) in the egress direction toward the Ethernet segment.
AB
с каких пор контролплейн евпн в чипы переехал?
ну инфа же должна из RE попасть в PFE не?
Y
это из rfc не?
IS
Yaroslav
это из rfc не?
Y
DF Election as Per RFC 7432
Y
текстовка похожая
Y
ну вообщем понятно
IS
да, в RFC тоже есть
Y
пасиб
IS
Yaroslav
ну вообщем понятно
Что циска говно и делает все не по рфц?
IS
;) ;)
Y
Что циска говно и делает все не по рфц?
ммм ну rfc написано под mpls, поэтому соотенесение не явное
IS
Yaroslav
ммм ну rfc написано под mpls, поэтому соотенесение не явное
ну да :)
Y
по хорошему df для vxlan должен быть отдельно
Y
фактически можно сказать что стандартом не регламентируется но самый близкий rfc 7432 - берем логику оттдуа
IS
Yaroslav
фактически можно сказать что стандартом не регламентируется но самый близкий rfc 7432 - берем логику оттдуа
Они там в джуне опять чего-то добавили по ссылке, надо будет перечитать
E
Своп отменяется, вместо этого будем жарить гречку на мангале
Может лучше на сковороде?
Y
Они там в джуне опять чего-то добавили по ссылке, надо будет перечитать
ты запоминаешь дату апдейта? 5-Dec-19 ))