Hello! Wed, Dec 05, 2012 at 12:48:51PM +0200, minotaur wrote:
On Wed, Dec 05, 2012 at 12:28:42PM +0200, Dmitry Aksyonov wrote:
PD4-2731643776 Summit X350, X150, and X350 switches do not support L3 forwarding. Thus, there is no support for the L3 /L3_L4 loadsharing algorithm. Those CLIs though accepted without error, are not functional: enable sharing 2 grouping 2 algorithm address-based L3_L4 LACP. These CLIs should be blocked in these switches. However, they do work in Summit X250 and X450 switches, since they support L3 forwarding.
То, что 350-е хорошо балансируют на LACP трафик я так же могу подтвердить, но это не говорит о том, что они используют L3 алгоритм.
Тогда возникает вопрос - а как оно работает? :) Поддерживаю :)
Что-то типа раунд-робина думаю сейчас уже не чудо. Разброс будет в основном в виду разного размера пакетов. Широковещательные пакеты все вендоры обрабатывают по разному, обычно описывают в документации. По идее у Екстрима можно нарисовать аксесс листы для LAG, но я не пробовал.
В случае когда через lacp ходит один vlan между роутерами и /30 и ip между ними при обычной L2 src/dst mac балансировке трафик будет через один порт ходить. Но я вижу что ходит с нормальной погрешностью балансинга через оба :) Дима, а LACP работает между двумя X350ми или с другой стороны другой вендор?
The ExtremeXOS software provides multiple addressed-based algorithms. For some types of traffic, the algorithm is fixed and cannot be changed. For other types of traffic, you can configure an algorithm. Algorithm selection is not intended for use in predictive traffic engineering. Link Aggregation Algorithms--Summit X150, X250e, X350, X450a, and X450e Series Switches Summit X150, X250e, X350, X450a, and X450e series switches and SummitStack support address-based load sharing. (These platforms do not support port-based load sharing.) The following are the types of traffic to which addressed-based algorithms apply and the traffic components used to select egress links: Layer 2 frames and non-IP traffic--The source and destination MAC addresses. IPv4 and IPv6 packets--When a Summit X650 switch is not present in a SummitStack, load sharing is based on the configured options supported on each platform: - L2 algorithm--Layer 2 source and destination MAC addresses. Available on SummitStack and all Summit family switches. - L3_L4 algorithm--Layer 3 and Layer 4, the combined source and destination IP addresses and source and destination TCP and UDP port numbers. Available on SummitStack and Summit X250e, X450a, X450e, and X650 series switches. IPv4 and IPv6 packets--When Summit X650 switches are installed in a SummitStack, load sharing on all other switch types is based on the switch type: - All SummitStack compatible Summit family switches: Layer 3 and Layer 4, the combined source and destination IP addresses and source and destination TCP and UDP port numbers. Broadcast, multicast, and unknown unicast packets (not configurable)--Depends on traffic type: - IPv4 and IPv6 packets--The source and destination IP addresses. - Non-IP traffic--The source and destination MAC addresses. You control the field examined by the switch for address-based load sharing when the load-sharing group is created by using the following command: NOTE The L3 and custom keywords are not supported on Summit X150, X250e, X350, X450a, and X450e series switches. The L3_L4 keyword is not supported on Summit X150 and X350 series switches. Это из доки к 15.1
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