BROCADE IP PRIMER

BI4XGBI24CT X RX T X RX T X RX T X RXBI4XGBI24CT X RX T X RX T X RX T X RXBI24C6 12 18 2430 36 42 48BI24CBigIron RX-8NETWORKS1 7 13 1925 31 37 43BI24CBI24CBI24CBI24CT X RX T X RX T X RX T X RXT X RX T X RX T X RX T X RXAC OK DC OK ALMEJECT SYS AC OK DC OK ALMEJECT SYS AC OK DC OK ALMEJECT SYS AC OK DC OK ALMBI4XGBI4XGConsole49F Link 50FPowerEJECT SYS1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 39 41 43 45 471F 2F 3F 4F2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40 42 44 46 48BI4XGBI24CT X RX T X RX T X RX T X RXBI4XGBI24CT X RX T X RX T X RX T X RXBI24C6 12 18 2430 36 42 48BI24CBigIron RX-8NETWORKS1 7 13 1925 31 37 43BI24CBI24CBI24CBI24CAC OK DC OK ALMEJECT SYS AC OK DC OK ALMEJECT SYS AC OK DC OK ALMEJECT SYS AC OK DC OK ALMBI4XGBI4XGT X RX T X RX T X RX T X RXT X RX T X RX T X RX T X RXEJECT SYSChapter 14: Security, Redundancy and MoreWell, that is, after we do this:BR-SwitchA#conf tBR-SwitchA(config)#no ip nat inside source list Net10NAT poolPATAddress overloadBR-SwitchA(config)#ip nat inside source list NewNet10NAT poolPATAddress overloadWe had to get rid of the old NAT line, and we needed to give it a new one (withthe new ACL). Now, everyone's happy! The DNS server is getting out to theInternet, and the Internet is getting to it. Host A and his 10.1.1.0/24 buddiesare getting out to the Internet. And Host A can talk to Host B without gettingtranslated. See how well ACLs and NAT can work together?Redundancy: Virtual Router Redundancy Protocol(VRRP)Part of a network engineer's job is the never-ending struggle to eliminate singlepoints of failure. Redundancy is the answer, and thanks to RFC 3768, wehave a non-proprietary solution to this problem.What is VRRP?Virtual Router Redundancy Protocol (VRRP) is a protocol designed to allow two,or more, routers to share a virtual IP address. This allows for default gatewayredundancy. Let's look at an example:INTERNETe4e4e110.1.1.11/24e110.1.1.12/24Host A10.1.1.10/24Which router should Host A use as its default gateway? Router A? But what if itgoes down? We'd have to manually change the default gateway for Host A topoint to Router B. That's fine if you have only one host, but what if you haveseveral hundred?310 Brocade IP Primer