07-21-2004 07:18 AM - edited 03-02-2019 05:12 PM
Hi All,
here ismy query ..,
in our company we 've 1 cisco 1721 router. It has only 1 serial interface. Now campany has asked me to integrate it for another line. It has one slot for upgradation. Is it possible to utilise installing another serial interface and make the config such that it it routes to both the serial interface simultaniously .. i'm not a cisco expert . Asking help from guies out there ...
here is the sh run :--
Router>en
Password:
Router#sh run
Building configuration...
Current configuration : 1956 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Router
!
enable secret Y YYYYYYYYYY
!
ip subnet-zero
ip name-server 202.54.9.1
ip name-server 202.54.1.30
!
!
!
!
interface FastEthernet0
ip address 192.168.100.254 255.255.255.0
ip nat inside
speed auto
full-duplex
!
interface Serial0
ip address fff.ee.dd.29 kkk.kkk.kkk.252
ip access-group 101 in
ip accounting output-packets
ip nat outside
!
interface Serial1
ip unnumbered FastEthernet0
!
ip nat pool search aaa.bbb.ccc.33 aaa.bbb.ccc.60 netmask kkk.kkk.kkk.224
ip nat inside source list 1 pool search overload
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
ip route 0.0.0.0 0.0.0.0 fff.ee.dd.30
ip route 0.0.0.0 0.0.0.0 aaa.bbb.ccc.60 50
ip route aaa.bbb.ccc.128 255.255.255.128 Null0
no ip http server
!
!
access-list 1 permit 192.168.100.0 0.0.0.255
!
line con 0
exec-timeout 0 0
password X XXXXXXXXXX
login
line aux 0
line vty 0 4
password X XXXXXXXXXX
login
!
no scheduler allocate
end
-----------
If that is possible pls givethe logic how to implement this ..
Thank you ..
regards..
sanzee
07-21-2004 04:19 PM
Sanzee, I think "multilink PPP" is what you're looking for. Here's a couple of links:
Sample Configuration - Inverse MUX Application using Multilink PPP
http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a0080093d69.shtml
Multilink PPP on Back-to-Back Routers with Multiple Serial Interfaces
http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a00800a3b85.shtml
Hope this helps.
07-22-2004 03:03 AM
Thank you Konigl ,
But they are not much suitable for the simple one 1721 router. Best with 4500series or so . and in my case i 've controle on only my end of router. So configuring with this is not a practical one here as any of our isp s won't do any favour of configuring their router in sync with ours.
I was thinking weather we can user route-map insted and try routing as per source ip address, since i 'd be basically getting two sets of ip pool etc and two serial port to route for. i tryed with this :--
Router#sh run
Building configuration...
Current configuration : 1521 bytes
!
version 12.2
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname Router
!
enable secret Y YYYYY
!
ip subnet-zero
ip name-server 202.54.9.1
ip name-server 202.54.1.30
!
!
!
!
interface FastEthernet0
ip address 192.168.100.254 255.255.255.0
ip address mmm.nnn.o.210 kkk.kkk.kkk.240 secondary
ip nat inside
speed auto
full-duplex
!
interface Serial0
ip address fff.ee.dd.29 kkk.kkk.kkk.252
ip accounting output-packets
ip nat outside
!
interface Serial1
ip unnumbered FastEthernet0
!
ip nat pool search aaa.bbb.ccc.33 aaa.bbb.ccc.60 netmask kkk.kkk.kkk.224
ip nat inside source list 1 pool search overload
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0
ip route 0.0.0.0 0.0.0.0 Serial1
no ip http server
!
!
access-list 1 permit 192.168.100.0 0.0.0.255
access-list 102 permit ip aaa.bbb.ccc.32 0.0.0.31 any
access-list 103 permit ip mmm.nnn.o.208 0.0.0.15 any
route-map abc permit 10
match ip address 103
set ip next-hop ii.j.kkk.32
!
route-map abc permit 20
match ip address 102
set ip next-hop qqq.rr.ss.30
!
!
line con 0
exec-timeout 0 0
password X XXXXX
login
line aux 0
line vty 0 4
password X XXXXX
login
!
-------------
mmm.nnn.o.210 kkk.kkk.kkk.240-->S1 global IP
fff.ee.dd.29 kkk.kkk.kkk.252-->S0 global IP
aaa.bbb.ccc.33 aaa.bbb.ccc.60 netmask kkk.kkk.kkk.224----> ISP-1 ip pool
ip mmm.nnn.o.208 0.0.0.15-->ISp-2 ip pool windcard(mmm.nnn.o.208-mmm.nnn.o.223/24)ippool
ii.j.kkk.32-->ISP-2 router's ip
qqq.rr.ss.30-->ISP-1 router's ip
Since our ISP-2 prerequisie is to use ip unnumbered i just had to do this.I tried con make a secondary ipconfigured. make a separate subnet. route that traffic from saperately via root-map.
But this and its variant configuration whatever i did i found that either all the trafic is routing from S0 or no traffic is routing at all.
Do i 've to create equal metric distance for each route-map name.??
do guide is this going to work ..
sanzee
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