L******t 发帖数: 1985 | 1 Feature set matters most on the edge? Rumor has it T1600 is adding more
intelligence on the core by some sort of policy-based routing, which is
supposed to be done on the edge nowadays. Not 100% sure if it's true or
necessary.
will |
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z**r 发帖数: 17771 | 2 edge is the most complicated part, core is relative simple, mpls forwarding
plus the HA features
don't get it why core needs PBR, for TE traffic? but it should be done on
edge routers |
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z**r 发帖数: 17771 | 3 it looks similar to the Cisco CRS-1 multi-chassis system? |
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c*****i 发帖数: 631 | 5 不清楚,所以才问啊.juniper的mx9600.好像是下面接DC的switch,上面接isp?听说卖的
时候经常是两边都要,yahoo一个,att一个.cisco现在还没有竞争的produce,正在搞个从
crs平台上改过来的. |
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z**r 发帖数: 17771 | 6 听说google正在做自己的data center switch,类似Cisco的Nexus 7000或者Juniper的
EX 8200,甚至还在做自己的core router,类似Cisco CRS-1或者Juniper T1600
有什么必要呢?俺不认为google能做出比这些更好的来,就算能,花那么多钱做出来还
得自己接着后续开发维护,划算吗? |
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z**r 发帖数: 17771 | 7 CRS-1的routing engine已经跑在line card上了吧,其实也算是external的routing
engine? |
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z**r 发帖数: 17771 | 8 俺说的就是分布在全球的data center的流量啊。全球的流量也就一台router/switch就
满足了,更不要说cluster了,crs-1可以达到近百T,t-1600规模小点但是也足够了啊。
你说的这家vendor就是juniper吧?google好像两家都评估了,最后好像买t-1600不是
因为capacity的原因,主要是complain cisco bug fix周期太长 |
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w***s 发帖数: 321 | 9 没太明白他在说什么,C/D分离是从7x00开始的,GSR就分的很彻底了。CRS-1只是增加
了DRP而已,可以支持分布式的BGP,但是从网络的角度而言还是路由器自己计算自己的
,不算什么革命。 |
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z**r 发帖数: 17771 | 10 很有可能,单机功率甚至已经到了一个传统的机房不能保证散热正常了,比如CRS就需
要专门的机房 |
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w***s 发帖数: 321 | 11 知道你就要说这个,CRS-1支持72个LCCs,拿一个出来装16个DRP算浪费么,是不是就
External了?而你集中在一个RE Chassis就不怕单点故障?
说道革命,这些RE和原来单机RE有区别么,还不是RP + LC两级结构,管理以太网从背
板延伸到了光纤上,协议与功能不多也不少,只是在扩展能力有所提高而已。
要说有点再分离味道的是Cisco的Tunnel Builder Pro,只不过是局限在MPLS-TE上成不
了大气候。 |
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w***s 发帖数: 321 | 12 你认为不用JCS的时候有多少流量会跑到RE上去?
Juniper用单独的RE Chassis有他的考虑,但这个不是分布式控制平面的必要条件。
CRS-1每一个LCC上都有一个Active RP,在不需要DRP的时候就可以做到分布式了。 |
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m********r 发帖数: 543 | 13 T1600的耗电量只是CRS-1的一半, 买T1600吧 |
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m********r 发帖数: 543 | 14 which platform ah? I heard 7600 has 34 GE ports and 64 OC-3 ports per
chassis, if mount two 7600 together, it can be 128 oc-3 and 68 GE ports per
rack
CRS-1, each Line card has 40G capacity fixed. So it can support 40 GE ports
per
line card at the maximum bah |
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w***s 发帖数: 321 | 15 数数不是这么数的,CRS-1 LC上最多可以支持60 GEs, 当然用户如果只数数,会喜欢数
Cisco C4500的板卡,48GEs,白菜价,其他面议。
印象中J是以技术立身的,啥时候转型了。
per
ports |
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m********r 发帖数: 543 | 16 啥叫打开feature不能line rate? ADPC就是40G的line rate.
只能在QDPC上开oversubscribe的qos, feature
如果我没搞错cisco的product的话, nexus做的是data center的switch, 和mx960
router没有可比性. 要比, 等着明年初j的data center switch出来比吧
那么多cisco不同的产品, 又是76000, 又是ASR, 又是NEXUS的, os都不同, CLI都不一
样, 你们这些ISP NOC admin烦不烦啊? oops, 好像只有sprint一家顽固地卖力不断使
用cisco的新产品了吧. CRS-1都进不了其他两家的ng network了
feature
40port |
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L******t 发帖数: 1985 | 17 You are talking about service level oversubscription.
waves is talking about architecture level oversubscription. For example, an
8 10GE linecard with 40G fabric bandwidth, it's 2:1 oversubscription by
design.
CRS- |
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m********r 发帖数: 543 | 18 My whole point is that CRS-1 doesn't have a 60GE ports density per line card.
Well, high port density per line card on core router is never a requirement. When the port density is a requirement on core router, the core router itself is evolving toward the edge. And there will be a next generation core router come into picture. It does not make sense to compare the port density of a edge router with a core router. However, when we were talking about MX960 port density, waves jumped into claim 60G |
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c*****i 发帖数: 631 | 19 应该不止8个把.72个是理论上的.现在也就做到4个. |
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w***s 发帖数: 321 | 20 ( 8 * 24 * 9 ) / ( 3 * 8 ) = 72 |
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w**l 发帖数: 49 | 21
早晨醒来,直奔这里。唉,就是喜欢技术这口。
Wave,你厚道一点会亏钱呀?解释一下?我试一下。请指教。
为什么系统最多支持8个FCC? |
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w***s 发帖数: 321 | 22 木有那么复杂亚,所以就偷懒了:
( 8 FCC * 24 slots per FCC * 9 Bundle ports per FCC Fabric card ) /
( 3 Bundle ports per slot * 8 fabric LCC Fabric Cards )
= 72
一个LCC要消耗24个Bundle ports, 一个FCC最多可以提供24*9=216个,理论上单个FCC
可以支持9个LCC。 |
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w**l 发帖数: 49 | 23 Waves,
为何在网上查询不到您说的“9 Bundle ports per FCC Fabric card”这样的资料?
能否指出和解释一下。谢谢。
FCC |
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w**l 发帖数: 49 | 24 技术就是一张纸。不点就象一堵墙。
谢谢了。我清楚了。 |
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w***s 发帖数: 321 | 26 突然发现,这东西可以用来做一个廉价的类CRS-1网络:
Fabric ASIC -> Switch
Control Ethernet -> Controller Network
RP/DRP -> Controller
因为每个交换机都可以更换,所以一个Plane也就够了。
如果能控制好地址的结构化,那么blade Switch相当于个简装版MSC,现在大概知道
google做自己的Switch干什么了;-D
了? |
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w**l 发帖数: 49 | 27 http://www.tektalk.cn/?p=2377
思科和Juniper的操作系统之争:一个还是多个?
作者 杰夫 | 2008-04-23 16:09 | 类型 专题分析, 弯曲推荐 | 12条用户评论 »
image 最近几个月来,Juniper公司一直高调宣传他们只有一个操作系统(OS,
Operating System),JUNOS,贯穿其所有产品,大大降低了用户网络的管理成本,不
像其竞争对手,有很多个操作系统,管理困难,…,云云。Juniper所谓的竞争对手,
也就是思科(Cisco),却好像每宣布一个新产品,就推出一个新的操作系统–边缘路
由器ASR 1000的操作系统是IOS XE,网络交换机Nexus 7000的操作系统是NX-OS(详见
相关文章),再加上原有的核心路由器CRS-1(见左图)的操作系统IOS XR,以及思科
传统的IOS操作系统。看起来,Juniper和思科的OS战略有所不同,那么,一个和多个OS
,到底哪个更好?
直觉告诉我们,当然是一个更好。多个不同的OS增加用户的维护成本和学习时间
,很多网络设备用户也表 |
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e**********w 发帖数: 117 | 28 I'm evaluating them not only from user CLI experience point of view. JUNOS
main code base is written 13 years ago. It's way behind the modern computer
science technology nowadays. But lazy Juniper people are still sleeping on
the old technology, self-satisfied, while cisco is catching up. Look at how
CRS-3, IOS-XR has really done a good job, incorporating server cluster's
idea into router. That's the key why juniper can only do multi-chassis
system with 4 slaves under 1, but cisco can do as many |
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m********d 发帖数: 188 | 29 "Junos is powerful". this is very important for operating a real large
scale network. think about check BGP route in a full table. you really
can't do much with IOS, but JUNOS can help you a lot.
You can always apply filter to interface for all internet inbound
traffic not having to worry about the performance. On cisco router, we
usually don't do that.
I've been using cisco device ( from 2500 to GSR, no CRS-1 yet, from 2900
to 6500 and N7K/5K/2K ) for 10+ years, only 3+ years on juniper, but I |
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c*****i 发帖数: 631 | 30 what's the bfd timer which is used? I'm not sure Juniper, but for crs and
gsr, bfd and nsr can coexist without issue.
would be the behavior when GR/NSR occurs, based on juniper documentation
and what our SE tells us.
routers do that?
as |
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l***y 发帖数: 791 | 31 I guess, maybe, for crs and gsr, bfd is always distributed to the cards? coz
for junos/junosE, as long as the cards support distributed bfd, the GR/NSR
can coexist with bfd without problems. it's when bfd is dependent on the RE/
SRP, with C bit set to 0, when the card is dead, the bfd session is lost,
but the neighbor would hold the routing info assuming it is a RE/SRP switch
and wait as if RE/SRP switch has occured. |
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S******n 发帖数: 617 | 32 And today we got:
*CISCO: NEW ROUTER FEATURES 12X SPEED CNBC SAYS
*CISCO: AT&T ALREADY IN TRIAL WITH NEW CRS-3 ROUTER: CNBC SAYS
*CISCO UNVEILS NEW ROUTER, CNBC REPORTS
What the FUCK? Just a new router to change the Internet forever?? |
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e**********w 发帖数: 117 | 34 这里说的feature set有多套,不是说有不同的functionality,而是说同一个feature得
在不同OS上写一遍。就拿nexus 7000来说,他们的Nexus OS和CRS上run的IOS XR,以及
和以前老的IOS是完全不一样的,都是不同的人写的。以前和他们的DE打过交道,一个
vendor的module有一些小改动,DE坚决不让改,因为cisco内部有几套OS上已经写好了
这个module的driver,要改几个OS都得改。 One OS的就简单多了, not a big deal。 |
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z**r 发帖数: 17771 | 35 the bottom line is, the market needs 2 major vendors ... |
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e**********w 发帖数: 117 | 36 这是。但谁占market share的60%还是make a difference的。 |
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e**********w 发帖数: 117 | 37 你在verizon? what's MC? 你们的缩略语都是哪儿学的?我全看不懂。;p
如果说multi-chassis, 1拖4的T1600,10.0就出去了 |
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e**********w 发帖数: 117 | 40 那是4年以前。2年以前又跳走了。此人so far已经3进3出cisco |
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z**r 发帖数: 17771 | 41 又回cisco了, now, Cisco fellow |
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m********d 发帖数: 188 | 42 cisco just doesn't want Tony works for any other competitor? |
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z**r 发帖数: 17771 | 45 att用ethernet to the cellsite, sprint用eomplsogre,verizon呢?verizon
wireless的data backbone应该挺牛的,CRS最大客户之一,应该有好几百台吧?但是
wireless backhaul呢?有谁知道? |
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s********k 发帖数: 6180 | 46 大侠,你说说这个“门”究竟是哪方面?华为入门是说技术能力提高了,还是市场公关
打开了,还是消
除别人的偏见了?门槛高应该能想象,但是华为鼓捣了这么些年技术能力应该也差得不
是太多,工程
师队伍,销售,资金支持也应该不是问题,为啥说09年才入门?
后,华为之前
始终不得其门而
以上节点的
扩展性需求是没
而这里显然市
场容量还是很
你先有时我先,
不必在意一时
年全球第1
个正式商用,
要的。
好像时间
表是年中,相信
是单槽
100G平台,CRS-1 |
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s*****g 发帖数: 1055 | 47 YES,7600/GSR/CRS-1/ASR can use the same physical interfaces, google SIP/SPA. |
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m********d 发帖数: 188 | 48
理(
logical router我是比较了解的,不过是在lab环境下。我曾经用到过15个LR(上限,
不包括main router),一些LR里又有若干个virtual router,非常强大,可以模拟
相当复杂的网络环境,又不损失性能指标。crs-1好像也通过增加一个特殊的板卡(双
槽?)
来支持这个功能,据说是某个大客户的要求,但也只能支持2个,毕竟设计实现的方法
不同。
但我想了解的是实际中是怎么用的,例如最简单的隔离core,dia ar, vpn ar等等。
建议不要提具体用户的名字,这样讨论起来没什么顾虑,方便有效很多。 |
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w***s 发帖数: 321 | 49 GSR/65/76都是死马,不被人替掉就真没天理了。
至于CRS-1和10GE的优势劣势是什么关系? |
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w***s 发帖数: 321 | 50 大家有啥看法?这么早发布是想将CRS-NG掐死? |
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