x*********n
发帖数: 28013 | 1 比如
interface Serial1/0:0
description ***CKT ID:DHZA.318570..LB***
ip address 208.88.222.38 255.255.255.252
no cdp enable
service-policy output Voip
end
没有enable encapsulation ppp，就是默认hdlc么？ |
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z**r
发帖数: 17771 | 2 PBT stands for Prvider Backbone Transportation, 从字面看，它不是一个给企业用
的东西，企业对于carrier用什么技术完全是不知道的，对他来说完全是透明的。
俺上一个例子中只有PE之后才是PBT，最终用户依然是dsl or fiber，对于STB来说，就
像俺上面所说，依然完全透明。
刚开始俺觉得这个PBT的确很新鲜，但是隐隐约约觉得PBT能做的，现有设备都能做，虽
然从单一的ethernet service看貌似便宜一些，但是一个carrier尤其Tier 1/2这些，
不可能只提供ethernet，PBT则根本不可能提供PPP/FR/HDLC等等给最终用户，而如果
backbone是MPLS则情况大大不同了。所以从TCO的角度看，PBT不见得就便宜，因为为了
提供PPP/FR/HDLC/ATM等业务，carrier还不得不继续维护另一套网络。如果是MPLS则没
有这个必要了。
俺觉得PBT并不是根传统的ethernet竞争，而是根MPLS，T-MPLS这些竞争 |
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o****p
发帖数: 9785 | 3 干活又不是靠的算法，对网络基本原理都不懂，tcpip怎么个工作原理都不懂，怎么干
活？
我有一次在首页看到有所谓高手云集的在tcp上讨论设计一个传报文的通信协议，还要
用象hdlc这样转义的编码格式，呵呵，呵呵，呵呵，呵呵 |
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Q*S
发帖数: 395 | 4 我可以举我自己的例子吗？
我每天早晨四个鸡蛋，一个星期大概吃三天共约 36oz.烤牛排，其他四天是炖或者煮的
肉。总胆固醇 222mg/dL， HDL 68mg/dL， CHOL/HDLC ratio=3.3. 根据ACC/AHA 2013
CVD risk calculator, 我的 CVD risk 比同年龄组的人低几倍。
（其他人不要轻易跟我学 - 我每天平均在 gym 里至少呆两个半到三个小时）
made |
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s******e
发帖数: 1037 | 5 Physical exam 结果
HDL Cholesterol 33 our of range (refenrce >=40 mg/dl)
Triglycerides 185 (<150)
Chol/HDLC ratio 5.6 High (reference <=5.0 (calc)) |
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s******e
发帖数: 1037 | 6 Physical exam 结果
HDL Cholesterol 33 our of range (refenrce >=40 mg/dl)
Triglycerides 185 (<150)
Chol/HDLC ratio 5.6 High (reference <=5.0 (calc))
该怎么办？ |
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f*******d
发帖数: 12693 | 7 T1是商用的专线，速度非常稳定，上面跑HDLC的话overhead很少基本1.5就是1.5了。 |
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C******0
发帖数: 26 | 8 My HDL and LDL are normal:
HDL 77 (>=46mg/dL)
LDL 51 (<130mg/dL)
Triglycerides 206 (<150mg/dL)
Total Cholesterol 169 (125-200mg/dL)
chol/hdlc ratio 2.2 (<=5.0) |
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b******e
发帖数: 66 | 9 Who are they? what kind of product are they delivering or promised to deliver?
what the major problem are they trying to solve? Some startups were trying to
build such PWE3 switch boxes to interconnect ATM/FR/SONET/ETHERNET/HDLC/
blabla, set up PWs and directly hand the traffic over to MPLS core, the main
purpose of such box is to ease SP's non-interruptive migration and converge
everything to IP/MPLS core. Just wondering what is the potential of such box?
I can see some con side of such box: t |
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s*****g
发帖数: 1055 | 10 atom? I was majoring in atom/molecular physics back in college, I am an
expert in atom, shrodinger equation etc. Just kidding, although they all belong to MPLS L2 VPN category, Cisco seems to differentiate among EoMPLS, VPLS, and AToM which specifically refers to PPP/HDLC/ATM/FR over MPLS. |
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d****i
发帖数: 1038 | 11 not really. actually, AToM in Cisco mainly means ldp signaled pseudowire.
belong to MPLS L2 VPN category, Cisco seems to differentiate among EoMPLS,
VPLS, and AToM which specifically refers to PPP/HDLC/ATM/FR over MPLS. |
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t*******r
发帖数: 3271 | 12 唉这位老大非要说英文不可嘛~~~~看得我怪累的.
我倒是觉得如果是说MPLS VPN, 指的是二层三层都有的.
还有PPVPN只是隔离, 没有加密.
belong to
MPLS L2 VPN category, Cisco seems to differentiate among EoMPLS, VPLS, and
AToM
which specifically refers to PPP/HDLC/ATM/FR over MPLS. |
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z**r
发帖数: 17771 | 13 AToM主要用来和基于L2TPv3等tunnel的L2VPN区分的吧？如果说MPLS L2VPN俺觉得就应
该是AToM
belong to MPLS L2 VPN category, Cisco seems to differentiate among EoMPLS,
VPLS, and AToM which specifically refers to PPP/HDLC/ATM/FR over MPLS. |
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L******t
发帖数: 1985 | 14 来自主题: EmergingNetworking版 - 网络技术问题 A minor correction, if using PPP as l2 encap, mostly likely you are using
HDLC, which has its own CRC field.
be
of layered TCP/IP is that upper layer does not depend on any specific
lower layer delivery. |
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a**********k
发帖数: 1953 | 18 When G-MPLS is used in Sonet/DWDM network, in theory it can do signalling on
any transport protocols(PPP, or HDLC?), but most
of the times, it will still be on some type of out-of-band or
in-band IP stack. |
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s*****g
发帖数: 1055 | 19 Let me try to answer your questions, there are two types of MPLS VPNs, MPLS
L2VPN and MPLS L3VPN, MPLS L3VPN is standardized in well known RFC2547,
payload is IP, MPLS L2VPN is a general term for (Cisco)AToM, EoMPLS and
VPLS, payload is FR/HDLC but more commonly Ethernet/Ethernet VLAN.
ISPs need to run IGP in their own internal network, because MPLS LSPs are
typically among iBGP loopbacks, iBGP has to be on top of TCP/IP, of course
you can have MPLS LSPs that are purely used to transport IP tra... 阅读全帖 |
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