Cisco： HSRP和MSHRP與NT 5.0和HP AdvanceStack的互操作性 問(wèn)題描述 Cisco熱備路由協(xié)議(HSRP)或多熱備路由器協(xié)議(MSHRP)如何使用內(nèi)部組治理協(xié)議(IGMP)與Microsoft NT 5.0和HP AdvanceStack或PRoCurve交換機(jī)互操作？ 解決方法 兩個(gè)路由器與兩個(gè)不同的交換機(jī)端口連接，HSRP和MSHRP使用ip多點(diǎn)傳送數(shù)據(jù)報(bào)來(lái)確保在其它路由器故障時(shí)，其中的一個(gè)路由器可以用作備份。一個(gè)或多個(gè)NT服務(wù)與交換機(jī)端口、而不是路由器使用的兩個(gè)端口連接。 當(dāng)NT服務(wù)器與交換機(jī)連接時(shí)，它向交換機(jī)發(fā)送一個(gè)IGMP連接消息(指定Cisco的HSRP/MSHRP地址224.0.0.2)，這時(shí)，這是加入該多點(diǎn)傳送組的唯一的一個(gè)交換機(jī)端口，因?yàn)镃isco路由器從來(lái)沒(méi)有加入這個(gè)組(它們只是使用多點(diǎn)傳送地址)。隨后，交換機(jī)停止向其它端口轉(zhuǎn)發(fā)，包括路由器。對(duì)交換機(jī)而言，這是正確的IGMP行為。 問(wèn)題在于Cisco路由器不再互相接收HSRP/MSHRP數(shù)據(jù)包，因此協(xié)議無(wú)法正常工作。 對(duì)于這種情況，使用下面的步驟作為規(guī)避方法： 1. 配置惠普交換機(jī)封鎖或轉(zhuǎn)發(fā)各個(gè)端口上的IP多點(diǎn)傳送流量，不考慮IGMP。 2. 在直接連接兩個(gè)(M)HSRP路由器的端口的交換機(jī)IGMP配置中指定Forward (與Auto或Blocked)相反。 這個(gè)變化使交換機(jī)在這些端口之間轉(zhuǎn)發(fā)所有的多點(diǎn)傳送流量。 注：這是一個(gè)交換機(jī)IGMP配置項(xiàng)，而不是交換機(jī)流量/安全性過(guò)濾器。 x .........following with all English text .... [A5551807/TRAK-ACTIVE/English] A5551807 Cisco: interOperability of HSRP and MSHRP w/ NT 5.0 and HP AdvanceStack
Problem Description
How does the Cisco Hot Standby Routing Protocol (HSRP) or Multiple Hot Standby Router Protocol (MSHRP) interoperate with Microsoft NT 5.0, and HP AdvanceStack or ProCurve switch, with Interior Group Management Protocol (IGMP)?
Solution Two routers are connected to two different switch ports. HSRP and MSHRP use IP multicast datagrams to ensure that one of the routers is available as a backup in case the other router goes down. One or more NT servers are connected to switch ports other than the two used by the routers. When the NT server is connected to the switch, it sends an IGMP join message to the switch (specifying Cisco's HSRP/MSHRP address 224.0.0.2). At this point, this is the only switch port joined to that multicast group, since Cisco routers never perform a join to this group (they simply use the multicast address). Subsequently, the switch stops forwarding to the other ports, including those to the routers. This is correct IGMP behavior on the part of the switches. The problem is that the Cisco routers no longer receive each other's HSRP/MSHRP packets, so the protocol cannot work properly. Use these steps as a work-around for this behavior: 1. Configure HP switches to block or forward IP multicast traffic on individual ports, regardless of IGMP. 2. Specify Forward (as opposed to Auto or Blocked) in the switch's IGMP configuration on the ports which directly connect the two (M)HSRP routers. This change causes the switch to forward all multicast traffic between those ports. Note: This is a switch IGMP configuration item, not a switch Traffic/Security filter.
