配置LDPGR示例.doc

配置LDP GR示例组网需求如图1所示。节点LSRA、LSRB和LSRC都为双主控设备。3个节点属于同一OSPF域，通过OSPF协议实现网络互连，并提供GR机制。在LSRA、LSRB和LSRC之间建立LDP会话，当LSRB的主板发生故障并切换时，通过LDP GR机制与邻居节点进行同步。图1 配置LDP GR组网图 交换机接口对应的VLANIFIP地址LSRAGE1/0/0VLANIF1010.1.1.1/24LSRBGE1/0/0VLANIF1010.1.1.2/24LSRBGE2/0/0VLANIF2010.2.1.1/24LSRCGE1/0/0VLANIF2010.2.1.2/24配置思路采用如下思路配置LDP GR：1. 配置VLAN，配置VLANIF接口。 2. 配置各节点接口的IP地址及作为LSR ID的Loopback地址，并用OSPF协议通告各接口所连网段和LSR ID主机路由。 3. 在各节点上配置OSPF GR功能。 4. 全局使能各节点的MPLS和MPLS LDP。 5. 使能各接口的MPLS和MPLS LDP。 6. 在LSRB上配置LDP会话协商过程中的参数。 7. 在各节点上使能MPLS LDP协议的GR能力。 8. 在LSRB上配置MPLS LDP协议的GR会话和邻居参数。数据准备为完成此配置示例，需要准备如下数据： 各节点接口的IP地址如图1，OSPF进程号，所在的区域 OSPF GR的时间间隔 LDP会话容错重连接时间（本例采用缺省值300秒） LDP会话邻居存活时间（本例采用缺省值600秒） LSP会话恢复时间（本例采用缺省值300秒）操作步骤1. 配置VLAN，配置VLANIF接口 请参照图1配置VLAN和VLANIF接口。2. 配置接口IP地址 请参照图1配置各个VLANIF接口IP地址。3. 配置OSPF协议发布各节点接口所连网段和LSR ID的主机路由 4. 配置OSPF GR功能 # 配置LSRA。 system-viewLSRA ospf 1LSRA-ospf-1 opaque-capability enableLSRA-ospf-1 graceful-restartLSRA-ospf-1 quit# 配置LSRB。 system-viewLSRB ospf 1LSRB-ospf-1 opaque-capability enableLSRB-ospf-1 graceful-restartLSRB-ospf-1 quit# 配置LSRC。 system-viewLSRC ospf 1LSRC-ospf-1 opaque-capability enableLSRC-ospf-1 graceful-restartLSRC-ospf-1 quit5. 配置各节点全局的MPLS和MPLS LDP能力 # 配置LSRA。LSRA mpls lsr-id 1.1.1.9LSRA mplsLSRA-mpls quitLSRA mpls ldpLSRA-mpls-ldp quit# 配置LSRB。LSRB mpls lsr-id 2.2.2.9LSRB mplsLSRB-mpls quitLSRB mpls ldpLSRB-mpls-ldp quit# 配置LSRC。LSRC mpls lsr-id 3.3.3.9LSRC mplsLSRC-mpls quitLSRC mpls ldpLSRC-mpls-ldp quit6. 配置各接口的MPLS和MPLS LDP能力 # 配置LSRA。LSRA interface vlanif 10LSRA-Vlanif10 mplsLSRA-Vlanif10 mpls ldpLSRA-Vlanif10 quit# 配置LSRB。LSRB interface vlanif 10LSRB-Vlanif10 mplsLSRB-Vlanif10 mpls ldpLSRB-Vlanif10 quitLSRB interface vlanif 20LSRB-Vlanif20 mplsLSRB-Vlanif20 mpls ldpLSRB-Vlanif20 quit# 配置LSRC。LSRC interface vlanif 20LSRC-Vlanif20 mplsLSRC-Vlanif20 mpls ldpLSRC-Vlanif20 quit完成上述配置后，LSRA和LSRB、LSRB和LSRC之间的本地LDP会话建立成功。在各节点上执行display mpls ldp session命令，可以看到LDP会话的建立情况。以LSRA的显示为例：LSRA display mpls ldp session LDP Session(s) in Public Network- Peer-ID Status LAM SsnRole SsnAge KA-Sent/Rcv- 2.2.2.9:0 Operational DU Passive 000:00:02 9/9-TOTAL: 1 Session(s) Found.LAM : Label Advertisement Mode SsnAge Unit : DDD:HH:MM7. 配置LDP GR功能 # 配置LSRA。LSRA mpls ldpLSRA-mpls-ldp graceful-restartWarning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)yLSRA-mpls-ldp quit# 配置LSRB。LSRB mpls ldpLSRB-mpls-ldp graceful-restartWarning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)yLSRB-mpls-ldp quit# 配置LSRC。LSRC mpls ldpLSRC-mpls-ldp graceful-restartWarning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)yLSRC-mpls-ldp quit8. 在GR重启节点配置LDP GR的相关参数 # 配置LSRB。LSRB mpls ldpLSRB-mpls-ldp graceful-restart timer reconnect 300Warning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)yLSRB-mpls-ldp graceful-restart timer neighbor-liveness 600Warning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)yLSRB-mpls-ldp graceful-restart timer recovery 300Warning: All the related sessions will be deleted if the operation is performed!Continue? (y/n)yLSRB-mpls-ldp quit9. 检查配置结果 # 完成上述配置后，在LSR上执行display mpls ldp session verbose命令，可以看到“Session FT Flag”字段的值为“On”。以LSRA的显示为例。LSRAdisplay mpls ldp session verbose LDP Session(s) in Public Network - Peer LDP ID : 2.2.2.9:0 Local LDP ID : 1.1.1.9:0 TCP Connection : 1.1.1.9 - 2.2.2.9 Session State : Operational Session Role : Passive Session FT Flag : On MD5 Flag : Off Reconnect Timer : 300 Sec Recovery Timer : 300 Sec Negotiated Keepalive Timer : 45 Sec Keepalive Message Sent/Rcvd : 1/1 (Message Count) Label Advertisement Mode : Downstream Unsolicited Label Resource Status(Peer/Local) : Available/Available Session Age : 000:00:00 (DDD:HH:MM) Addresses received from peer: (Count: 3) 10.1.1.2 10.2.1.1 2.2.2.9 -或者在LSR上执行display mpls ldp peer verbose命令，可以看到“Peer FT Flag”字段的值为“On”。以LSRA的显示为例。LSRAdisplay mpls ldp peer verbose LDP Peer Information in Public network - Peer LDP ID : 2.2.2.9:0 Peer Max PDU Length : 4096 Peer Transport Address : 2.2.2.9 Peer Loop Detection : Off Peer Path Vector Limit : - Peer FT Flag : On Peer Keepalive Timer : 45 Sec Recovery Timer : 300 Sec Reconnect Timer : 300 Sec Peer Label Advertisement Mode : Downstream Unsolicited Peer Discovery Source : Vlanif10 -配置文件 LSRA的配置文件 # sysname LSRA # vlan batch 10 # mpls lsr-id 1.1.1.9 mpls # mpls ldp graceful-restart # interface Vlanif10 ip address 10.1.1.1 255.255.255.0 mpls mpls ldp # interface GigabitEthernet1/0/0 port link-type access port default vlan 10 # interface LoopBack1 ip address 1.1.1.9 255.255.255.255 # ospf 1 opaque-capability enable graceful-restart area 0.0.0.0 network 1.1.1.9 0.0.0.0 network 10.1.1.0 0.0.0.255 #return LSRB的配置文件 # sysname LSRB # vlan batch 10 20 # mpls lsr-id 2.2.2.9 mpls # mpls ldp graceful-restart graceful-restart timer reconnect 300 graceful-restart timer neighbor-liveness 600 graceful-restart timer recovery 300 # interface Vlanif10 ip address 10.1.1.2 255.255.255.0 mpls mpls ldp # interface Vlanif20 ip address 10.2.1.1 255.255.255.0 mpls mpls ldp # interface GigabitEthernet1/0/0 port link-type access port default vlan 10 # interface GigabitEthernet2/0/0 port link-type access port default vlan 20 # interface LoopBack1 ip address 2.2.2.9 255.255.255.255 # ospf 1 opaque-capability enable graceful-restart area 0.0.0.0 network 2.2.2.9 0.0.0.0 network 10.1.1.0 0.0.0.255 network 10.2.1.0 0.0.0.255 #return LSRC的配置文件 # sysname LSRC # vlan batch 20 # mpls lsr-id 3.3.3.9 mpls # mpls ldp graceful-restart # interface Vlanif20 ip addr