Hi Guys
There is problem with bgp multihomed configuration where i need redundancy between two diffrent ISP terminated on
same router .fa interface for the ISP2 is getting chocked and i gues its due to reverse path .
Please help here to configure redundancy and load sharing with BGP in case of two ISP on single router .
below is my configuration -
interface GigabitEthernet0/0
description =======================ISP1
ip address x.x.x.13 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip flow egress
duplex auto
speed auto
interface FastEthernet0/0/0
description ---------------------ISP 2
ip address x.x.x.2 255.255.255.252
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip flow egress
duplex full
speed 100
!
!
router bgp 56061
no synchronization
bgp log-neighbor-changes
network x8x.xx8.x2.0 mask 255.255.255.0
neighbor x.x.x.41 remote-as 4xx5====================>>ISP2
neighbor x.x.x.41 route-map AS_PREPEND out
neighbor x.x.x.14 remote-as 18xx1 ======================ISP1
neighbor x.x.x.14 weight 500
neighbor x.x.x.14 route-map ADVT out
no auto-summary
!
route-map AS_PREPEND permit 10
match ip address prefix-list ADV
set as-path prepend 56061 56x61 56x61 56x61
!
GigabitEthernet0/0 is up, line protocol is up
Hardware is PQ3_TSEC, address is 68ef.bdb7.b0b0 (bia 68ef.bdb7.b0b0) --------connected to ---------ISP1
Description: "EON Internet WAN"
Internet address is x.x.x.x/30
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 4/255, rxload 1/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, media type is RJ45
output flow-control is unsupported, input flow-control is unsupported
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
Input queue: 0/75/492/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 557000 bits/sec, 90 packets/sec
5 minute output rate 1587000 bits/sec, 914 packets/sec
4118392465 packets input, 4094842836806 bytes, 0 no buffer
Received 7796 broadcasts, 0 runts, 0 giants, 25 throttles
1 input errors, 0 CRC, 0 frame, 1 overrun, 0 ignored
0 watchdog, 0 multicast, 0 pause input
0 input packets with dribble condition detected
4492175709 packets output, 917883638205 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier, 0 pause output
0 output buffer failures, 0 output buffers swapped out
FastEthernet0/0/0 is up, line protocol is up
Hardware is FastEthernet, address is 68ef.bd00.0bff (bia 68ef.bd00.0bff) --------connected to ---------ISP2
Description: APNIC- LINK Tata 6 MB (020100224846) ***
Internet address is x.x3.x.x/30
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 15/255
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s, 100BaseTX/FX
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:23, output 00:00:08, output hang never
Last clearing of "show interface" counters 7w6d
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: fifo
Output queue: 0/40 (size/max)
5 minute input rate 6120000 bits/sec, 835 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
1339856029 packets input, 1160684921670 bytes
Received 353 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
667749 packets output, 41399459 bytes, 0 underruns
0 output errors, 0 collisions, 4 interface resets
0 unknown protocol drops
0 babbles, 0 late collision, 0 deferred
0 lost carrier, 0 no carrier
0 output buffer failures, 0 output buffers swapped out
