虛擬化版本與功能比較表

VMWare Vsphere

Citrix Xen Server

Citrix vs VMWare 版本與功能對應比較表

Citrix vs VMWare 價格比較表

範例一

範例二

Lab 6-2 Using the AS_PATH Attribute

Topology

GNS檔案

SanJose
!
!Step 0: Basic Setting
conf t
hostname SanJose
no ip domain-lookup
end
!
!Step 1: IP Addressing
conf t
int s 0/0
ip add 192.168.1.5 255.255.255.252
no sh
int lo 0
ip add 201.0.0.1 255.255.255.0
no sh
end
!
!Step 2: Configure BGP
conf t
router bgp 100
neighbor 192.168.1.6 remote-as 300
network 201.0.0.0
end

ISP
!
!Step 0: Basic Setting
conf t
hostname ISP
no ip domain-lookup
end
!
!Step 1: IP Addressing
conf t
int s 0/0
ip add 192.168.1.6 255.255.255.252
no sh
int s 0/1
ip add 172.24.1.17 255.255.255.252
no sh
int lo 0
ip add 202.0.0.1 255.255.255.0
no sh
end
!
!Step 2: Configure BGP
conf t
router bgp 300
neighbor 192.168.1.5 remote-as 100
neighbor 172.24.1.18 remote-as 65000
network 202.0.0.0
end
!
!Step 3: Remove the Private AS
conf t
router bgp 300
neighbor 192.168.1.5 remove-private-as
end
!
!Step 4: Use the AS_PATH Attribute to Filter Routes
conf t
!過濾AS-Path字元為 開始100結束
ip as-path access-list 1 deny ^100$
!允許AS-Path字元為 一個字元+任意字元 = i 或 i xxx
ip as-path access-list 1 permit .*
end
!將產生好的as-path acl 套用到往172.24.1.18的更新上(OUT)
conf t
router bgp 300
neighbor 172.24.1.18 filter-list 1 out
end

CustRtr
!
!Step 0: Basic Setting
conf t
hostname CustRtr
no ip domain-lookup
end
!
!Step 1: IP Addressing
conf t
int s 0/1
ip add 172.24.1.18 255.255.255.252
no sh
int lo 0
ip add 203.0.0.1 255.255.255.0
no sh
!
!Step 2: Configure BGP
conf t
router bgp 65000
neighbor 172.24.1.17 remote-as 300
network 203.0.0.0
end

show指令
show ip route
show ip bgp
show ip bgp neighbor
show ip bgp regexp ^100$

clear指令
clear ip bgp *
clear ip bgp 192.168.1.5 soft out
clear ip bgp 172.24.1.18 soft out

參考文件
Removing Private Autonomous System Numbers in BGP

Using Regular Expressions in BGP

Lab 6-1 Configuring BGP with Default Routing

Topology

GNS檔案

SanJose
!
!Step 0: Basic Setting
conf t
hostname SanJose
no ip domain-lookup
end
!
!Step 1: Assign IP Addresses
conf t
int s 0/0
ip add 10.0.0.2 255.255.255.252
no sh
int s 0/1
ip add 172.16.0.2 255.255.255.252
no sh
int lo0
ip add 192.168.0.1 255.255.255.0
no sh
int lo1
ip add 192.168.1.1 255.255.255.0
no sh
end
!
!Step 3: Configure SanJose BGP
conf t
router bgp 100
neighbor 10.0.0.1 remote-as 200
neighbor 172.16.0.1 remote-as 300
network 192.168.0.0
network 192.168.1.0
end
!
!Step 4: Verify BGP on the SanJose Router
show ip bgp
!
!針對ISP1的lo0介面做shutdown
show ip bgp
show ip bgp neighbor
!
!Step 5: Filter Routes
conf t
access-list 192.168.0.0 0.0.1.255
end
!
conf t
router bgp 100
neighbor 10.0.0.1 distribute-list 1 out
neighbor 172.16.0.1 distribute-list 1 out
end
!
!Hardware Update BGP Session Out
clear ip bgp *
!
!Soft Update BGP Session Out
clear ip bgp 100 soft out
!
!Step 6: Configure the Primary and Backup Routes Using Floating Static Routes
conf t
ip route 0.0.0.0 0.0.0.0 10.0.0.1 210
ip route 0.0.0.0 0.0.0.0 172.16.0.1 220
end
!啟用extend ping (TargetIP 210.210.210.1, SourceIP 192.168.1.1)
ping
!
!Step 7: Configure Primary and Backup Routes Using Static Routes
conf t
no ip route 0.0.0.0 0.0.0.0 10.0.0.1 210
no ip route 0.0.0.0 0.0.0.0 172.16.0.1 220
end
!
!使用ip default-network指令來送出Default Gateway(Primary)
conf t
ip default-network 210.210.210.0
end
!設定Backup default route至172.16.0.1(Secondary)
conf t
ip route 0.0.0.0 0.0.0.0 172.16.0.1 220
end

ISP1
!
!Step 0: Basic Setting
conf t
hostname ISP1
no ip domain-lookup
end
!
!Step 1: Assign IP Addresses
conf t
int s 0/0
ip add 10.0.0.1 255.255.255.252
no sh
int lo0
ip add 12.0.1.1 255.255.255.0
no sh
end
!
!Step 2: Configure the ISPs
conf t
router bgp 200
neighbor 10.0.0.2 remote-as 100
network 12.0.1.0 mask 255.255.255.0
end
!
!Step 6: Configure the Primary and Backup Routes Using Floating Static Routes
conf t
int lo 100
ip add 210.210.210.1 255.255.255.0
no sh
end
Step 7: Configure Primary and Backup Routes Using Static Routes
conf t
router bgp 200
network 210.210.210.0
end
clear ip bgp 10.0.0.2

ISP2
!
!Step 0: Basic Setting
conf t
hostname ISP2
no ip domain-lookup
end
!
!Step 1: Assign IP Addresses
conf t
int s 0/1
ip add 172.16.0.1 255.255.255.252
no sh
int lo0
ip add 172.16.1.1 255.255.255.0
no sh
end
!
!Step 2: Configure the ISPs
conf t
router bgp 300
neighbor 172.16.0.2 remote-as 100
network 172.16.1.0 mask 255.255.255.0
end

show指令
show ip int brief
show ip route
show ip route bgp
show ip bgp

clear指令
clear ip bgp *
clear ip bgp 10.0.0.1 soft out
clear ip bgp 172.16.0.1 soft out

參考文件
Sample Configuration for BGP with Two Different Service Providers (Multihoming)

BGP Soft Reset Enhancement

修復XenServer重開機後無法掛載Openfiler iSCSI LUN

系統版本 Openfiler 2.3

1. 使用root身分登入openfiler

2. vi /etc/rc.sysinit (將333-337行的內容註解掉)

#       if [ -x /sbin/lvm.static ]; then  
#               if /sbin/lvm.static vgscan --mknodes --ignorelockingfailure > /dev/null 2>&1 ; then  
#                    action $"Setting up Logical Volume Management:" /sbin/lvm.static vgchange -a y -ignorelockingfailure  
#               fi  
#       fi

3. vi /etc/lvm/lvm.conf (修改53行的內容)

   filter = [ "r|/dev/dm-*|", "r|/dev/VG_XenStorage*|", "r|/dev/sr/iscsi|", "a/.*/" ]

4. 輸入下列指令 
service aoe force-stop

5. 重開機
init 6

參考文件 https://forums.openfiler.com/viewtopic.php?id=2280&p=2