Cisco BGP 調整Weight 與Local_PREF

透過route-map調整Weight 與Local_PREF的值，來達到控制連出路徑的功能
router bgp 65002
 bgp log-neighbor-changes
 neighbor 1.1.1.1 remote-as 65051
 neighbor 1.1.1.1 ebgp-multihop 2
 neighbor 1.1.1.1 soft-reconfiguration inbound
 neighbor 1.1.1.1 route-map changelocal in
!
ip prefix-list any-route seq 5 permit 0.0.0.0/0 le 32
!
ip prefix-list google-local-140 seq 5 permit 12.0.0.0/8 le 32
!
ip prefix-list google-local-50 seq 5 permit 8.0.0.0/8 le 32
!
ip prefix-list google-route seq 5 permit 8.0.0.0/8 le 32
!

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BGP_LAB實作

因為工作的需要，最近又開始了下班回家做LAB的人生Orz.....開始複習起了BGP協定，只不過這次是用Unified Networking Lab的Cisco模擬器來建立BGP LAB，搭配bgpsimple這隻BGP程式來產生上游ISP(AS65000) Internet Transit的BGP route送給LAB裡面的Router，以下為實作架構圖，練習建立eBGP peer和iBGP peer，個人覺得BGP最難的不是設定的方式，而是整個背後運作的原理啊!!!(繼續努力K書中~)

ISP-BGP-PE#show running-config 

version 15.2

service timestamps debug datetime localtime

service timestamps log datetime localtime

!

hostname ISP-BGP-PE

!

boot-start-marker

boot-end-marker

!

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Linux自動排程刪掉舊檔案

建立自動刪檔Srcipt

vi /root/del-nfsen-oldfile.sh

chmod +x del-nfsen-oldfile.sh

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BGP Commands

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IPv6 LAB 進階實作

Mikrotik_RouterOS設定

[admin@Mikrotik_RouterOS] > /export 

/interface ethernet

set [ find default-name=ether1 ] name=ether1_MGMT speed=1Gbps

set [ find default-name=ether2 ] name=ether2_WAN

set [ find default-name=ether3 ] name=ether3_LAN

/ip address

add address=192.168.88.30/24 interface=ether1_MGMT network=192.168.88.0

add address=192.168.98.254/24 interface=ether3_LAN network=192.168.98.0

/ipv6 address

add address=2001:b034:700:480::254/80 advertise=no interface=ether3_LAN

add address=2001:b034:700:400::1:1/112 advertise=no interface=ether2_WAN

/ipv6 route

add check-gateway=ping distance=1 dst-address=2001:b034:700:480::/64 gateway=2001:b034:700:480::253

/system identity

set name=Mikrotik_RouterOS

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IPv6 LAB 實作

實作架構圖

ISP_Router#show running-config
Building configuration...

Current configuration : 839 bytes
!
version 15.1
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname ISP_Router
!
ip cef
ipv6 unicast-routing
!
ipv6 cef
!
interface GigabitEthernet0/0
ip address 210.61.79.50 255.255.255.252
duplex auto
speed auto
ipv6 address 2001:B034:700:400::1:2/112
ipv6 enable
!

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