Equal-Cost Multi-Path (ECMP) Routing

The ASA supports Equal-Cost Multi-Path (ECMP) routing.

You can have up to 8 equal cost static or dynamic routes per interface. For example, you can configure multiple default routes on the outside interface that specify different gateways.

route outside 0 0 10.1.1.2
route outside 0 0 10.1.1.3
route outside 0 0 10.1.1.4

继续阅读

This example uses the hierarchical QoS Policy in order to shape all outbound traffic on the outside interface to 50 Mbps like the shaping example but it also specifies that Voice packets with the Differentiated Services Code Point (DSCP) value “ef”, as well as Secure Shell (SSH) traffic, shall receive priority.

  • Create the priority queue on the interface on which you want to enable the feature:
ciscoasa(config)#priority-queue outside1
ciscoasa(config-priority-queue)#queue-limit 2048 // max
ciscoasa(config-priority-queue)#tx-ring-limit 511 // max
ciscoasa(config)#priority-queue outside2
ciscoasa(config-priority-queue)#queue-limit 2048 // max
ciscoasa(config-priority-queue)#tx-ring-limit 511 // max

继续阅读

This is how you set a Ge interface on a Juniper device disable auto MDI-X negotiation as well as set the speed on the interface to 1Gbps.

set interfaces ge-0/0/1 ether-options no-auto-negotiation
set interfaces ge-0/0/1 ether-options link-mode full-duplex
set interfaces ge-0/0/1 ether-options speed 1g

前言

SLO和SLA是大家常见的两个名词:服务等级目标和服务等级协议。

云计算时代,各大云服务提供商都发布有自己服务的SLA条款,比如Amazon的EC2和S3服务都有相应的SLA条款。这些大公司的SLA看上去如此的高达上,一般是怎么定义出来的呢?本文就尝试从技术角度解剖一下SLA的制定过程。

说SLA不能不提SLO,这个是众所周知的,但是还有一个概念知道的人就不多了,那就是SLI(Service Level Indicator),定义一个可执行的SLA,好的SLO和SLI是必不可少的

再有就是SLI/SLO/SLA都是和服务联系在一起的,脱离了服务这三个概念就没有什么意义了。

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