[Sysname-bgp] filter-policy 2000 import # 在BGP-VPN实例视图下,使用编号为2000的ACL对所有BGP接收的路由进行过滤。(必须首先创建vpn1) <Sysname> system-view [Sysname] bgp 100 [Sysname-bgp] ipv4-family vpn-instance vpn1 [Sysname-bgp-ipv4-vpn1] filter-policy 2000 import # 使用编号为3000的ACL对...
Filtering会根据Path Attribute过滤BGP Message,可以自己定义,也有BGP程序自带的过滤。还是以AS_PATH为例,如果目的BGP Peer的AS在BGP Message的AS_PATH中,那么这条BGP Message不会生成对应的发往该BGP Peer的BGP Message。 Manipulation会修改BGP Message的Path Attribute,例如修改MED值,进而生成发往BGP Peer的BGP Message。
Verifying BGP Prefix-Based Outbound Route Filtering Configured in Send Mode The following example output from theshow running-configprivileged EXEC command shows that neighbor 192.168.20.72 is configured with the prefix-based ORF feature in send mode: Router# show running-config | begin bgp router bg...
IPv6 BGP Prefix-Based Outbound Route Filtering配置示例
1. BGP Adjacent in RIB 这一步比较简单,来者不拒,所有收到的BGP Message都存到了BGP Adjacent in RIB。 2. Input Policy Input policy会完成两部分工作,filtering和manipulation。 Filtering会根据Path Attribute过滤BGP Message,这里需要注意两个内置的过滤,一个是判断当前二手手机号码买卖的AS是否在BGP Message的AS...
BGP Outbound Route Filtering (ORF)实验 在R1与R4之间配置BGP ORF,使R1不能广播155.1.5.0/24 到R4 【实验拓扑】 【实验基本配置】 1: interface FastEthernet0/0 ip address 155.1.146.1 255.255.255.0 interface Serial0/0 ip address 155.1.13.1 255.255.255.0...
Show Route Filtering To show route filtering results in the BGP routing table after applying inbound policies, run the NVUEnv show vrf <vrf> router bgp address-family loc-ribcommand or the vtyshshow ip bgpcommand. cumulus@leaf01:~$ nv show vrf default router bgp address-family ipv4 ...
华为BGP ORF(Outbound Route Filtering),RFC5291、RFC5292规定了BGP基于前缀的ORF能力,能将本端设备配置的基于前缀的入口策略通过路由刷新报文发送给BGP邻居。BGP邻居根据这些策略构造出口策略,在路由发送时对路由条目进行过滤。这样不仅避免了本端设备接收大量无用的
clear ip bgp soft in prefix-filter Show ip bgp neighbor received prefix-filter Comments Introduction ORF is another method used for filtering. This one in particular allows a BGP router o send a prefix-list to a BGP neighbor that it should apply back towards the router. Outbound Routing Filt...
Order of operations for ingress IPv6 BGP route filtering: ■ Inbound route map ■ Inbound fi lter list ■ Inbound prefi x list | distribute-list (only one of them is supported) ■ Order of operations for egress IPv6 BGP route filtering: ...