x*********n
发帖数: 28013 | 1 router bgp 100
neighbor 150.2.5.5 ebgp-multihop 2
R5：
router bgp 200
neighbor 150.2.4.4 ebgp-multihop 2
加了这2个，neighbor还是没建立啊。一共才2跳，2够了吧？ |
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x*********n
发帖数: 28013 | 2 R4：
router bgp 100
no synchronization
bgp log-neighbor-changes
neighbor 150.2.5.5 remote-as 200
neighbor 150.2.5.5 disable-connected-check
neighbor 150.2.5.5 update-source Loopback0
R5：
router bgp 200
no synchronization
bgp log-neighbor-changes
neighbor 150.2.4.4 remote-as 100
neighbor 150.2.4.4 disable-connected-check
neighbor 150.2.4.4 update-source Loopback0
答案给的是这个，但是
sh ip bgp sum的时候，那个status总是active，这个说明啥，要从哪里差错？
sh ip route里面，彼此对方的subnet都没有进table。ping 不通。
ping 2边的serial口，能ping通。
大家说是为啥啊？缺... 阅读全帖 |
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x*********n
发帖数: 28013 | 4 我后来放了个multihop 255，结果还是不work。郁闷啊。 |
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x*********n
发帖数: 28013 | 5 neighbor 150.2.5.5 disable-connected-check 就是解决TTL的啊，没有multihop应该
也可以的。 |
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w******t
发帖数: 241 | 6 无论手机还是wifi，基本都是无线设备连接到基站或者AP，算是single hop的，想知道
multihop或者mesh的wireless network在工业或者商用领域前景怎么样？有什么大规模
应用吗？ |
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x*********n
发帖数: 28013 | 7 用 loopback 做router ID,如果AS都是65011，那不是ibgp么？
这个ebgp-multihop 20是啥意思呢？
router bgp 65011
no synchronization
bgp log-neighbor-changes
network 172.16.220.0 mask 255.255.255.0
neighbor 172.16.20.1 remote-as 65011
neighbor 172.16.20.1 ebgp-multihop 20
neighbor 172.16.20.1 update-source Loopback0
neighbor 172.16.20.3 remote-as 65011
neighbor 172.16.20.3 ebgp-multihop 20
neighbor 172.16.20.3 update-source Loopback0
neighbor 172.16.20.4 remote-as 65011
neighbor 172.16.20.4 ebgp-multihop 20
neighbor 172.16... 阅读全帖 |
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x*********n
发帖数: 28013 | 8 multihop肯定不是啦，我原来有disable connection这个command的，效果和multihop
一样，不过consume的memory和cpu少。
lab还特意去掉disable那个，不work，然后放上multihop，又work了。 |
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w***7
发帖数: 1637 | 9 新语丝(www.xys.org)(xys5.dxiong.com)(www.xinyusi.info)(xys2.dropin.org)◇◇
华中师范大学副校长杨宗凯涉嫌嫖窃和一稿多投的学术不端行为
作者：白露
崇敬的方舟子先生，向您的百折不饶的学术打假精神表示由衷的敬意！
我是北京师范大学教授，阅读了“新语丝” 2011年4月19日刊发的“华中科
技大学杨宗凯学术不端恶性一稿多投”一文，深有同感。特补充以下事实。除了
已经揭发的那两篇论文是一稿多投，一稿多发外，他的其它多篇论文也有涉嫌嫖
窃和一稿多投的学术不端行为。
论文 (1a）Shengbin Liao, Wenqing Cheng, Zongkai Yang, Wei Liu, Wei
Yuan: A Utility-Optimal Backoff Algorithm for Clustered Sensor Networks.
VTC Spring 2008: 158-162，
几乎同样的内容变换了一下作者顺序又在国内刊物上发表在
(1b) Liao Sheng-bin, Yang Zong-kai, Cheng Wen-q... 阅读全帖 |
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n**a
发帖数: 41 | 10 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
|
m****s
发帖数: 18160 | 11 【 以下文字转载自 Arizona 讨论区 】
发信人: nyca (nyca), 信区: Arizona
标 题: intern position available
发信站: BBS 未名空间站 (Tue Dec 5 00:46:09 2006)
A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum |
|
M******0
发帖数: 29 | 12 Mitsubishi Electric Research Labs is seeking a highly motivated, qualified
individual to join the Electronics and Communications group for a 3 month
internship program in summer 2015. The ideal candidate will be expected to
carry out research on heterogeneous wireless networks and develop resource
efficient network technologies for emerging applications such as internet of
things and industrial automation. Candidates should have experience in
developing technologies such as routing and multihop ... 阅读全帖 |
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s********n
发帖数: 166 | 13 会议论文审稿，有兴趣请站内投条。
Interference characterization
Cognitive radio, ultra-wideband
Multihop and cooperative communications
Modulation, coding, diversity
Equalization, synchronization, channel estimation
Space-time coding, MIMO, adaptive antennas
OFDM, CDMA, spread spectrum
Channel modeling and characterization
Interference cancellation and multiuser detection
Iterative techniques
Information-theoretic aspects of wireless communications
Signal processin... 阅读全帖 |
|
n**a
发帖数: 41 | 14 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
|
n**a
发帖数: 41 | 15 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
|
n**a
发帖数: 41 | 16 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
|
n**a
发帖数: 41 | 17 A premium research lab in Boston area is currently seeking a highly
motivated intern to conduct MAC protocol/algorithm design and evaluation for
IEEE 802.16-related system. The ideal candidate should
1) Design, analyze and simulate new/enhanced MAC protocol that enables
mobile multihop relay and other advanced concept for IEEE 802.16e OFDMA
system
2) Possess at minimum an MS and preferably pursue his/her PhD degree in the
related field (e.g., EE or CS)
3) Have experience with protocol design an |
|
d**i
发帖数: 23 | 18 【 以下文字转载自 Internet 讨论区,原文如下 】
发信人: dali (aaaaaaaaaaaaa), 信区: Internet
标 题: question on the interconnections of switches
发信站: The unknown SPACE (Wed Oct 9 14:15:00 2002) WWW-POST
When multiple switches are connected, how could they realize the routing when
the source and destination requires multihop? simply by MAC address?
If the system is not connected to Internet, say, a cluster system, is router
required in this case? If there is some routing algorithm within the switch,
can I modify it to |
|
z*****n
发帖数: 7639 | 19 这没什么吧，简单的协议层间通信。packet buffer都是静态的循环数组。
只不过ATmega128只有4kRAM，实现复杂功能比如multihop内存捉襟见肘。 |
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z**r
发帖数: 17771 | 20 in http://tools.ietf.org/html/draft-raggarwa-l3vpn-2547-mvpn-00#page-10
it says
Option A: VRF-to-VRF connections at the AS border routers.
Option B: EBGP redistribution of labeled VPN-IP routes from AS to
neighboring AS.
Option C: Multihop EBGP distribution of labeled VPN-IP routes between
source and destination ASes, with EBGP redistribution of labeled IP
routes from AS to neighboring AS.
but in many other document, I see
Back to Back VRF connections (Option A)
VPNv4 routes di |
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p**x
发帖数: 123 | 21 bgp requires direct tcp connection in order to form peering, otherwise
multihop is required. in your case, 172.16.20.1 should be a remote loopback
address or a indirect physical address. |
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x*********n
发帖数: 28013 | 22 是啊。172.16.20.1是remote loopback IP address。
因为loopback address是up的，所以可以算direct tcp connection，所以，multihop
is not required for this case， 是这个意思？
loopback |
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b****c
发帖数: 16 | 23 不对。拿直连线路建才叫直连...
multihop |
|
|
|
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x*********n
发帖数: 28013 | 27 我想起来了，是不是要声明一下network？
network （loopback IP） 255.255.255.0 |
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t*******r
发帖数: 3271 | 28 peer建立不建立和IOS BGP的network命令有撒关系?! |
|
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x*********n
发帖数: 28013 | 30 不知道啊。想不出办法瞎猜的。
我早就跟你说了，你要技术服人，不要每天打水仗，玩嚣张，都是爸爸了，要成熟。 |
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s******v
发帖数: 4495 | 31 bgp is not established, it must be some problems in tcp connection. try "
ping 150.2.5.5 source loopback0" on r2, to make sure the tcp conn between ur
ip address is good. |
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s******v
发帖数: 4495 | 32 用source loopback，需要把这个route告诉对方 |
|
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s******v
发帖数: 4495 | 34 这个正常，bgp一半用在，between AS，不像IGP, within AS，所以应该的 |
|
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x*********n
发帖数: 28013 | 36 ping一下，对方的router就知道loopback0这个subnet了？
ur |
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d******t
发帖数: 834 | 37 nope.
如果没有冗余链路，建ebgp邻居最好用直连接口。
真要用loopback建，要互相添加静态路由的，ebgp peers之间没igp，network有啥用。
。。 |
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d**i
发帖数: 23 | 38 When multiple switches are connected, how could they realize the routing when
the source and destination requires multihop? simply by MAC address?
If the system is not connected to Internet, say, a cluster system, is router
required in this case? If there is some routing algorithm within the switch,
can I modify it to realize my own routing algorithm?
Thanks! |
|
s********k
发帖数: 6180 | 39 how much low latency do you want? don't use full zigbee stack since it is a
lot of trash in layer 3 and above. but MAC/PHY 802.15.4 is pretty neat.
if you need routing/multihop, latency is issue for sure. even MAC is CSMA
based. |
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o*******i
发帖数: 396 | 40 其实我觉得sprint和moto本来做cellular的，很多wimax精华的概念都抛弃了。赔掉裤
子也是正常。比如multihop mesh。licensed band也是一大拦路虎，像我们这下人都没
法测试只能跑ns2仿真。要是像wifi一样频段的话，wimax设备现在应该铺天盖地了。
技术上来说wimax还是很cool的，漂亮的tdma又很灵活 。不过wimax有点太fancy了不实
用，尤其是QoS scheduling，想想ATM怎么隔辟着凉的就是了，更何况是timevarying的
wirelesschannel。
这个技术现在也不好挖坑灌水了。 |
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w******t
发帖数: 241 | 42 算，现在哪里有大规模的WSN的应用？实验室性质不算 |
|
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a****l
发帖数: 8211 | 44 those kind of application is totally different from the kind boasted by WSN
papers: they are static, fixed number of sensors . |
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c*******h
发帖数: 4883 | 45 比如说石油公司，监视钻井/管道什么的。曾经看见bp找人做水下的wsn。 |
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w******t
发帖数: 241 | 46 这些应用的难点在于很难像)手机那样全球统一的协议。基本是一个应用一个专门做的
协议或者网络，太依赖应用了。我看能达到GSM规模万分之一都难。所以不好大规模普及 |
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w******t
发帖数: 241 | 47 可以了，能从比较简单的应用做起已经不错了。但是这个就是个个案
WSN |
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s********k
发帖数: 6180 | 48 GSM和PSTN跟现在的internet还是本质不同，GSM和PSTN核心网不是用的internet的TCP/
IP架构，现在移动网才在向全IP方向转，而且远没有完成。移动当然也可以部署wifi，
但是成本比电信高多了，移动没有电信这样家家入户adsl的网络基础。wifi的部署如果
按照像BS那样部署岂不是浪费太大。而电信只需要加wireless router就可以了。再说
移动赚钱的经验都是按流量，按时间收费，像电信这样的包月收费从网络架构，计费软
件，市场策略，客户关系等等都不一样，转行不是那么容易把。你说的ad hoc的wifi肯
定是可以，但是效率太低。multihop下资源利用率非常不理想。 |
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P*****T
发帖数: 292 | 49 近年来IEEE/IEE上的Journal文章，相当可观。。
Xu, J., Wu, F., Liang, J., and Zhang, W., "Directional Lapped Transforms for
Imaged Coding", IEEE Transactions on Image Processing, accepted for future
publication.
Zhang, F., Wu, X., Yang, X., Zhang, W., and Zhang, L., "Robust Color
Demosaicking With Adaptation to Varying Spectral Correlations", IEEE
Transactions on Image Processing, accepted for future publication.
Lin Gao, Xinbing Wang, and Youyun Xu, "Multiradio Channel Allocation in
Multihop Wireless Networks", |
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s********n
发帖数: 166 | 50 会议论文审稿。有兴趣请站内投条。
Interference characterization
Cognitive radio, ultra-wideband
Multihop and cooperative communications
Modulation, coding, diversity
Equalization, synchronization, channel estimation
Space-time coding, MIMO, adaptive antennas
OFDM, CDMA, spread spectrum
Channel modeling and characterization
Interference cancellation and multiuser detection
Iterative techniques
Information-theoretic aspects of wireless communications
Signal processin... 阅读全帖 |
|
