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EmergingNetworking版 - sh ip bgp x.x.x.x
相关主题
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相关话题的讨论汇总
话题: origin话题: bgp话题: local话题: weight话题: igp
进入EmergingNetworking版参与讨论
1 (共1页)
x*********n
发帖数: 28013
1
means something吗?
比如我现在sh ip bgp x。x。x。x, 显示如下
Origin IGP, metric 0, localpref 100, weight 32768, valid, sourced, local,
best
这能证明这个attribute的scope吗?
比如,localpref应该是inside AS的,weight是router的,那这个Origin是啥?
比如我想知道这个attribute是在route里面attached还是local only的,用什么
command可以看呢?还是必须死记硬背?
n**********l
发帖数: 271
2
origin is set by the origin AS, usually meaningless for traffic engineering.
Different vendors use origin differently.
A common practice is to rewrite origin in all received routes.
core1.fmt1.he.net> show ip bgp routes detail 8.8.8.8
Number of BGP Routes matching display condition : 15
S:SUPPRESSED F:FILTERED s:STALE
1 Prefix: 8.8.8.0/24, Status: BI, Age: 9d1h58m39s
NEXT_HOP: 184.105.224.254, Metric: 15, Learned from Peer: 216.218.
252.165 (6939)
LOCAL_PREF: 100, MED: 1, ORIGIN: igp, Weight: 0
AS_PATH: 15169
2 Prefix: 8.8.8.0/24, Status: I, Age: 49d16h16m37s
NEXT_HOP: 72.14.219.161, Metric: 16, Learned from Peer: 216.218.252
.164 (6939)
LOCAL_PREF: 100, MED: 1, ORIGIN: igp, Weight: 0
AS_PATH: 15169
3 Prefix: 8.8.8.0/24, Status: I, Age: 103d2h24m25s
NEXT_HOP: 80.81.193.108, Metric: 1570, Learned from Peer: 216.218.
252.174 (6939)
LOCAL_PREF: 100, MED: 20, ORIGIN: igp, Weight: 0
x*********n
发帖数: 28013
3
同学,origin code在13条选择里面排名第5,怎么会没有意义呢?
我的意思是sh ip bgp xxx中显示,能不能指代出应用scope。

engineering.

【在 n**********l 的大作中提到】
: origin is set by the origin AS, usually meaningless for traffic engineering.
: Different vendors use origin differently.
: A common practice is to rewrite origin in all received routes.
: core1.fmt1.he.net> show ip bgp routes detail 8.8.8.8
: Number of BGP Routes matching display condition : 15
: S:SUPPRESSED F:FILTERED s:STALE
: 1 Prefix: 8.8.8.0/24, Status: BI, Age: 9d1h58m39s
: NEXT_HOP: 184.105.224.254, Metric: 15, Learned from Peer: 216.218.
: 252.165 (6939)
: LOCAL_PREF: 100, MED: 1, ORIGIN: igp, Weight: 0

n**********l
发帖数: 271
4

origin是IGP或者incomplete 如果做traffic engineering的话一般不都重写所有的
origin么?

【在 x*********n 的大作中提到】
: 同学,origin code在13条选择里面排名第5,怎么会没有意义呢?
: 我的意思是sh ip bgp xxx中显示,能不能指代出应用scope。
:
: engineering.

x*********n
发帖数: 28013
5
因为origin code是跟着route走的,所以改起来可以change routes
attribute可以改,才能改变路由选择,连改都不能改,or改的时候都没法改(比如
local only)的,你traffic engineer怎么做?
还有,TE要将domain的,是inter domain还是in the domain。

【在 n**********l 的大作中提到】
:
: origin是IGP或者incomplete 如果做traffic engineering的话一般不都重写所有的
: origin么?

1 (共1页)
进入EmergingNetworking版参与讨论
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问个BGP的弱智问题。大家面试的时候都被问什么了(主要是技术问题)?想了解一下
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本版水枪1-2月统计How many nexthops?
What could be the solution for the 20bit MPLS label length?求教一个网络传输时间计算问题
问一个简单的PE router的问题iBGP fully meshed?
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相关话题的讨论汇总
话题: origin话题: bgp话题: local话题: weight话题: igp