Nexus 9000思科智慧流量導向器
簡介
本檔案將介紹Nexus 9000平台上的智慧流量導向器(ITD)的組態和基本疑難排解
背景
Cisco Intelligent Traffic Director(ITD)如下所示
- 使用Cisco Nexus 5/6/7/9K交換機為第3層和第4層服務和應用提供基於ASIC（硬體）的流量分配。
- 它執行L3和L4流量分配，但不取代第7層負載均衡器。
- 執行負載平衡伺服器的運行狀況監控和自動故障處理。
- 它會自動建立ACL、路由對映策略以執行PBR功能來重定向和負載均衡流量。
採用元件
硬體 — C9372PX
軟體 — 7.0(3)I7(2)
許可證要求
Cisco NX-OS-ITD需要網路服務許可證。
在啟用「功能ITD」且我們沒有所需的許可證時，出現以下日誌。
VDC-1 %$ iscm[31793]:!!!!!! 警告：未在系統中找到「NETWORK_SERVICES_PKG」許可證 !!!!!!。你試過了
VDC-1 %$ iscm[31793]:系統支援基於榮譽的許可證。功能將啟用並完全正常工作。許可證使用
VDC-1 %$ iscm[31793]:如果您錯誤地啟用此功能，請禁用此功能。如果您沒有購買
為使用ITD需要啟用的功能
- 功能ITD
- 功能PBR
- 功能Sla發件人
- 功能SLA響應器*
拓撲
配置ITD
配置ITD服務的四個主要步驟
- 建立裝置組
- 建立ITD服務
- 將裝置組連線到ITD服務
- 將服務附加到入口介面
N9K_ITD
version 7.0(3)I7(2)
feature itd
itd device-group Test
probe icmp
node ip 192.168.1.1
node ip 192.168.1.2
itd Telnet
device-group Test ( Call the device group )
virtual ip 192.168.2.2 255.255.255.255 tcp 23 ( Optional )
ingress interface Vlan20 ( Assign ingress interface )
no shut
interface Vlan20
no shutdown
ip address 192.168.2.2/24
ip policy route-map Telnet_itd_pool ( This line gets automatically added when we “no shut” the ITD service )
附註：將此方法應用於L2介面會產生以下錯誤。建立L3介面或SVI。
N9K_ITD(config-itd)# ingress interface ethernet 1/3
ERROR: Interface:Ethernet1/3 is not a layer-3 interface
請注意，以下配置會自動新增，這些是通過PBR為定義為LB的每個節點建立的儲存桶。
Show run | section ITD
feature itd
ip access-list Telnet_itd_vip_1_bucket_1
10 permit tcp 1.1.1.0 255.255.255.127 192.168.2.4/32 eq telnet
ip access-list Telnet_itd_vip_1_bucket_2
10 permit tcp 1.1.1.128 255.255.255.127 192.168.2.4/32 eq telnet
route-map Telnet_itd_pool permit 10
description auto generated route-map for ITD service Telnet
match ip address Telnet_itd_vip_1_bucket_1
set ip next-hop verify-availability 192.168.1.1 track 2
route-map Telnet_itd_pool permit 11
description auto generated route-map for ITD service Telnet
match ip address Telnet_itd_vip_1_bucket_2
set ip next-hop verify-availability 192.168.1.2 track 3
ip policy route-map Telnet_itd_pool
switch(config)# show route-map Telnet_itd_pool
route-map Telnet_itd_pool, permit, sequence 10
Description: auto generated route-map for ITD service Telnet
Match clauses:
ip address (access-lists): Telnet_itd_bucket_1
Set clauses:
ip next-hop verify-availability 192.168.1.1 track 2 [ UP ]
route-map Telnet_itd_pool, permit, sequence 11
Description: auto generated route-map for ITD service Telnet
Match clauses:
ip address (access-lists): Telnet_itd_bucket_2
Set clauses:
ip next-hop verify-availability 192.168.1.2 track 3 [ UP ]
驗證ITD
N9K_ITD(config)# show itd Telnet statistics
Service Device Group VIP/mask
#Packets
-------------------------------------------------------------------------------------
Telnet Test 192.168.2.2 /
255.255.255.255 0 (0%)
Traffic Bucket Assigned to
Mode Original Node #Packets
--------------- --------------
Telnet_itd_vip_1_bucket_1 192.168.1.1
Bypass 192.168.1.1 0 (0%) <<<<<<<<<<
Traffic Bucket Assigned to
Mode Original Node #Packets
--------------- --------------
Telnet_itd_vip_1_bucket_2 192.168.1.2
Bypass 192.168.1.2 0 (0%) <<<<<<<<<<
switch(config)# show itd Telnet brief
Legend:
C-S(Config-State): A-Active,S-Standby,F-Failed
ST(Status): ST-Standby,LF-Link Failed,PF-Probe Failed,PD-Peer Down,IA-Inactive
Name LB Scheme Interface Status Buckets
-------------- ---------- ---------- -------- --------
Telnet src-ip Vlan20 ACTIVE 2 <<<<<<
Exclude ACL
-------------------------------
Device Group Probe Port
-------------------------------------------------- ----- ------
Test ICMP
Virtual IP Netmask/Prefix Protocol Port
------------------------------------------------------ ------------ ----------
192.168.2.2 / 255.255.255.255 TCP 23
Node IP C-S WGT Probe Port Probe-IP STS
------------------- -- --- ---- ----- --------------- --
1 192.168.1.1 A 1 ICMP OK<<<<
2 192.168.1.2 A 1 ICMP OK<<<<
Telnet至Vlan 20負載均衡器VIP(SVI)
Laptop - telnet 192.168.2.2
Trying 192.168.2.2...
Connected to 192.168.2.2.
由VIP接收並轉發到節點(192.168.1.1)的資料包為31個。
N9K_ITD(config)# show it Telnet statistics
Service Device Group VIP/mask
#Packets
--------------------------------------------------------------------------------
Telnet Test 192.168.2.2 /
255.255.255.255 31 (100.00%)
Traffic Bucket Assigned to
Mode Original Node #Packets
--------------- --------------
Telnet_itd_vip_1_bucket_1 192.168.1.1
Redirect 192.168.1.1 31 (100.00%)
Traffic Bucket Assigned to
Mode Original Node #Packets
--------------- --------------
Telnet_itd_vip_1_bucket_2 192.168.1.2
Redirect 192.168.1.2 0 (0.00%)
已知瑕疵:
https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc73162/?reffering_site=dumpcr
意見