Help me!!! Cho minh hoi ve Floating Static Route??

[Robert_Ngo]

Co ai biet lam on cho minh hoi la khi nao thi Floating Static Route duoc su dung va voi muc dich la gi dzay. Cam on nhiu hen :-)

[sinhvienngheo]

Re: Help me!!! Cho minh hoi ve Floating Static Route??

xin chào,

floating static route có cú pháp;

# ip route xxxx yyyyy [pointer] new-ad

trong đó xxxx là destination-network
yyyy là destination-netmask

pointer: next-hop router
new-ad: giá trị AD mới của route (giá trị default là 1)

Floating static route được dùng trong các giải pháp dial-backup. Khi primary route về net xxxx bị mất khỏi bảng routing-table, floating static route về net xxxx sẽ được đưa vào bảng routing-table. Floating static thông thường được chỉ qua next-hop router là các interface dialer.

Nếu Robert cần một sample configs, let us know.

Linh

[Robert_Ngo]

Cam on Sinhvienngheo nhieu. Neu duoc thi cho minh ban sample config di. Minh cung vua moi tim hieu xong roi, dai khai thi cung la y giong nhu Linh noi nhung ma khong biet la giai phap nay thich hop cho cac mang lon hay la chi doi voi cac mang nho thoi (vi cai nay thi admin phai cau hinh bang tay).

Robert

[imported_abc]

Đây là một vídụ rất cụ thể về floating static của cisco


Current configuration:
version 12.2
hostname Router1
!
!--- This username password pair is used for PPP CHAP authentication
username Router2 password 0 letmein
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-5ess
!
interface Ethernet0
ip address 172.16.1.1 255.255.255.0
no ip route-cache
no ip mroute-cache
!
interface Serial0

!--- Primary Link.
!--- The bandwidth is adjusted to allow for rapid backup of the link.


!--- This adjusts the EIGRP Hello interval and Hold time for rapid convergence.
!--- The bandwidth command does not actually change the bandwidth of the link,
!--- it only adjusts the routing protocol bandwidth parameter.

bandwidth 2048
ip address 172.16.2.1 255.255.255.128
encapsulation frame-relay
no ip route-cache
no ip mroute-cache
clockrate 64000
!
interface Serial1
no ip address
no ip route-cache
no ip mroute-cache
shutdown
!
interface BRI0

! -- Backup link.

ip address 172.16.3.1 255.255.255.0

! -- The backup link is in a different subnet.
! -- The BRI interface on the peer should also be in this subnet.
encapsulation ppp
no ip route-cache
no ip mroute-cache
dialer map ip 172.16.3.2 name Router2 broadcast 5552000

! -- Dialer map for the peer. Note the IP address and name.
! -- The name must match the authenticated username of the peer.

dialer load-threshold 5 either
dialer-group 1
! -- Apply interesting traffic definition.
! -- Interesting traffic definition is defined in dialer-list 1.

isdn switch-type basic-5ess
ppp authentication chap
ppp multilink
!
router eigrp 100

!--- This example uses eigrp. You can use any routing protocol instead.

network 172.16.0.0
auto-summary
no eigrp log-neighbor-changes
!
ip classless
ip route 172.16.4.0 255.255.255.0 172.16.3.2 200

!--- The floating static route is defined.
!--- Note the administrative distance of the route is 200.
!--- Hence it is only used when all other routes for 172.16.4.0/24
!--- are lost. Note that the next hop for the floating static route
!--- matches the dialer map ip. If the nexthop is not the same as
!--- in the dialer map then the router will no dial.
access-list 100 deny eigrp any any
access-list 100 permit ip any any
!--- EIGRP routing packets are denied in the dialer-list.
!--- This prevents eigrp packets from keeping the link up.
!--- Adjust the interesting traffic depending on your traffic definitions.

dialer-list 1 protocol ip list 100
!--- Interesting traffic defintion. Use access-list 100.
!--- The interesting traffic is applied to BRI interface using dialer-group 1.
!
line con 0
line aux 0
transport input all
line vty 0 4
login
!
end
----------------------------
Router2 (Cisco 2503 Router)

Current configuration:

version 12.2
!
hostname Router2
!
username Router1 password 0 letmein
ip subnet-zero
no ip domain-lookup
!
isdn switch-type basic-5ess
!
!
interface Ethernet0
ip address 172.16.4.1 255.255.255.0
!
interface Serial0
bandwidth 2048
ip address 172.16.2.2 255.255.255.128
encapsulation frame-relay
clockrate 64000
!
interface Serial1
no ip address
shutdown
clockrate 64000
!
interface BRI0
ip address 172.16.3.2 255.255.255.0

! -- IP address of backup interface.
! -- This router accepts the call. Note the IP address matches both the
! -- dialer map floating static router nexthop on the peer.

encapsulation ppp
dialer-group 1
isdn switch-type basic-5ess
ppp authentication chap
ppp multilink

!--- The missing dialer map command disables this router from making the call.
!
router eigrp 100
network 172.16.0.0
auto-summary
no eigrp log-neighbor-changes

ip classless
ip route 172.16.1.0 255.255.255.0 172.16.3.1 200
!
access-list 100 deny eigrp any any
access-list 100 permit ip any any
dialer-list 1 protocol ip list 100
!
line con 0
line aux 0
line vty 0 4
!

[imported_abc]

thiếu cái diagram tôi gửi nốt

[Robert_Ngo]

Re: Help me!!! Cho minh hoi ve Floating Static Route??

Cám ơn mọi người nhiều,

Mình đã thi đậu BSCI rồi, bây giờ đang chuẩn bị cho kỳ thi BCMSN đây. Mình đang dự định thi CCDP nhưng mà tài liệu cho modun cuối cùng CID thì vẫn chưa có bản mới nhất, nếu ai biết thì vui lòng chỉ giáo dùm.

Thành thật cám ơn.

Robert Ngo