BFD has to at least establish the neighborship once, negotiate the timers etc. only after that it will begin the operation of fault detection. So you can configure it on one side without any concern.   -Vishesh ... View more

(*,G) is sparse-join/rpt-join/pim join and it represents a/some receivers have joined the group. This is forwarded hop-by-hop from last-hop router (connected to the receiver) to the RP(rendezvous point)   (S,G) represents the Source/Sender and the Group and builts the shortest path tree(SPT). There can be multiple senders for the same groups. All senders must register to the RP.   IP Mcast technology overview http://www.cisco.com/c/en/us/td/docs/ios/solutions_docs/ip_multicast/White_papers/mcst_ovr.html Quick Config Guide http://www.cisco.com/c/en/us/support/docs/ip/ip-multicast/9356-48.html Troubleshooting Guide http://www.cisco.com/c/en/us/support/docs/ip/ip-multicast/16450-mcastguide0.html   -Vishesh ... View more

http://docwiki.cisco.com/wiki/Category:NAT Document above states "Beware of using ACL for NAT with "permit ip any any" as you can get unpredictable results." I suggest that you use the "route-map nonat/nonat2 permit 20" instead of "permit any any"   For the remaining, modify the config as following - ! ip sla 10  icmp-echo 8.8.8.8 source-interface Dialer2  timeout 30000  frequency 30 ip sla schedule 10 life forever start-time now ! ip route 8.8.8.8 255.255.255.255 dialer2 permanent ! ! route-map nonat2 permit 10  match ip address 102  match interface Dialer2 ! route-map nonat permit 10  match ip address 102  match interface Dialer1 ! ip nat inside source route-map nonat interface Dialer1 overload ip nat inside source route-map nonat2 interface Dialer2 overload ! event manager applet NAT-TRACK event track 1 state any action 0.1 cli command "enable" action 0.2 wait 2 action 0.3 cli command "clear ip nat translations forced" action 0.4 syslog msg "NAT translation cleared after track state change" !   -Vishesh ... View more

(1.1.1.0/24)R1------R2------R3 R1 (12.0.0.0/24) R2 - OSPF R2 (23.0.0.0/24) R3 - iBGP R2#show ip route ospf | be Gate Gateway of last resort is not set       1.0.0.0/24 is subnetted, 1 subnets O        1.1.1.0 [110/2] via 12.0.0.1 , 00:10:58, GigabitEthernet1/0 ! router bgp 2  bgp log-neighbor-changes  network 1.1.1.0 mask 255.255.255.0 ! end R2#show ip bgp BGP table version is 8, local router ID is 2.2.2.2 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,               r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,               x best-external, a additional-path, c RIB-compressed, Origin codes: i - IGP, e - EGP, ? - incomplete RPKI validation codes: V valid, I invalid, N Not found      Network          Next Hop            Metric LocPrf Weight Path  *>  1.1.1.0/24       12.0.0.1                  2         32768 i   Injected by local router R2 (2.2.2.2) but next-hop remains unchanged R2#show ip bgp 1.1.1.0 BGP routing table entry for 1.1.1.0/24, version 8 Paths: (1 available, best #1, table default)   Not advertised to any peer   Refresh Epoch 1   Local     12.0.0.1 from 0.0.0.0 ( 2.2.2.2 )       Origin IGP, metric 2, localpref 100, weight 32768, valid, sourced, local, best R2(config)#router bgp 2 R2(config-router)#neighbor 23.0.0.3 remote-as 2 R2(config-router)#end R2# %SYS-5-CONFIG_I: Configured from console by console %BGP-5-ADJCHANGE: neighbor 23.0.0.3 Up R2# BGP(0): 23.0.0.3 NEXT_HOP is on same subnet as the bgp peer and set to 12.0.0.1 for net 1.1.1.0/24, flags 0, sb: 0, mask: 0 BGP(0): (base) 23.0.0.3 send UPDATE (format) 1.1.1.0/24, next 12.0.0.1, metric 2, path Local   R3# *Mar 23 23:26:30.143: %BGP-5-ADJCHANGE: neighbor 23.0.0.2 Up *Mar 23 23:26:30.423: BGP(0): 23.0.0.2 rcvd UPDATE w/ attr: nexthop 12.0.0.1 , origin i, localpref 100, metric 2 *Mar 23 23:26:30.427: BGP(0): 23.0.0.2 rcvd 1.1.1.0/24 *Mar 23 23:26:30.431: BGP(0): no valid path for 1.1.1.0/24 R3#show ip bgp BGP table version is 3, local router ID is 23.0.0.3 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,               r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,               x best-external, a additional-path, c RIB-compressed, Origin codes: i - IGP, e - EGP, ? - incomplete RPKI validation codes: V valid, I invalid, N Not found      Network          Next Hop            Metric LocPrf Weight Path  * i 1.1.1.0/24       12.0.0.1                 2    100      0 i   - Vishesh ... View more