03-18-2010 11:00 AM - edited 03-06-2019 10:12 AM
Can we combine 2 interfaces on same router for redundancy purpose, like we do port channelling on switch.
I know for redundancy on 2 layer3 device we can use routing protocols like HSRP,VRRP...
Is there any way we can use 2 interfaces on router to assign a single ip address, so that if 1 interface fails traffic will be forwarded through other interface .
Regards
Arulkumar
Solved! Go to Solution.
03-18-2010 11:17 AM
Is there any way we can use 2 interfaces on router to assign a single ip address, so that if 1 interface fails traffic will be forwarded through other interface .
Multilink PPP
http://blogs.techrepublic.com.com/networking/?p=498
HTH
Victor
03-18-2010 11:20 AM
Hello Arulkumar,
you could use IRB integrated routing and bridging
int f0/0
no ip address
bridge-group 1
int f0/1
no ip address
bridge-group 1
bridge 1 protocol ieee
bridge 1 route ip
interface BVI1
! here L3 configuration
ip address x.x.x.x 255.255.255.y
! HSRP config
the router will run STP 802.1D (protocol IEEE) and will interact with STP on switches
ensure that the switches are primary and secondary root bridge for the vlan
Note: the command may be supported only on physical interfaces and not on subinterfaces depending on platform and IOS image
only one interface is active at a given time if the device is not the STP root bridge.
Edit:
I made the hyphotesis that you were referring to a LAN environment
For a WAN environment as suggested by Victor multilink PPP or multilink FR could be used.
Hope to help
Giuseppe
03-19-2010 07:41 AM
Hello
you can have L3 etherchannels for ethernet family of interfaces. I have seen 10G port channels between GSRs in a Tier 1 ISP i worked for.
just have a look at this ---> http://www.cisco.com/en/US/docs/ios/12_1t/12_1t5/feature/guide/dtfec.html
If you want to bundle POS interfaces you have POS channel.
These are in addition to those which are already mentioned like MLPPP, IRB etc.
Of course these might have IOS version dependencies
03-31-2010 03:19 AM
There is a new Feature on the ISR-G2 29xx and 39xx which have dual-purpose GE-Interface
interface gig 0/1
media-type sfp
media-type sfp auto-failover
So the SFP of gig0/1 is the primary interface the RJ45 of the gig0/1 is the Backup-Interface.
So you do not have any need to configure BVI Interfaces.
03-18-2010 11:17 AM
Is there any way we can use 2 interfaces on router to assign a single ip address, so that if 1 interface fails traffic will be forwarded through other interface .
Multilink PPP
http://blogs.techrepublic.com.com/networking/?p=498
HTH
Victor
03-18-2010 11:20 AM
Hello Arulkumar,
you could use IRB integrated routing and bridging
int f0/0
no ip address
bridge-group 1
int f0/1
no ip address
bridge-group 1
bridge 1 protocol ieee
bridge 1 route ip
interface BVI1
! here L3 configuration
ip address x.x.x.x 255.255.255.y
! HSRP config
the router will run STP 802.1D (protocol IEEE) and will interact with STP on switches
ensure that the switches are primary and secondary root bridge for the vlan
Note: the command may be supported only on physical interfaces and not on subinterfaces depending on platform and IOS image
only one interface is active at a given time if the device is not the STP root bridge.
Edit:
I made the hyphotesis that you were referring to a LAN environment
For a WAN environment as suggested by Victor multilink PPP or multilink FR could be used.
Hope to help
Giuseppe
03-18-2010 12:00 PM
Hi
On the same router (at the same time) can i use IRB for LAN side and multilink PPP for WAN side?
Regards
Arulkumar
03-18-2010 12:07 PM
never tried it. Dont see why not.
03-19-2010 12:21 AM
Hi,
Thank you for reply
Can this be done on cisco ASA Firewall?
If so please let me know how..
Regards
Arulkumar
03-19-2010 12:39 AM
Hi
I was able to find out how.
In addition to device-level failover, we can also configure interface
redundancy on the same chassis of a Cisco ASA firewall. Basically you create
a logical interface pair bundle (called interface redundant) in which you
include two physical interfaces. If one of the interfaces fail, the second
one in the redundancy pair takes over and starts passing traffic. You can
configure up to 8 redundant interface pairs. After you configure the
redundant interface pair, all security appliance configuration refers to
this logical redundant pair instead of the member physical interfaces.
Configuration Example:
ASA(config)# interface redundant 1
ASA(config-if)# member-interface gigabitethernet 0/0
ASA(config-if)# member-interface gigabitethernet 0/1
From now on, all interface related commands must refer to interface
redundant 1.
Regards
Arulkumar
03-19-2010 07:41 AM
Hello
you can have L3 etherchannels for ethernet family of interfaces. I have seen 10G port channels between GSRs in a Tier 1 ISP i worked for.
just have a look at this ---> http://www.cisco.com/en/US/docs/ios/12_1t/12_1t5/feature/guide/dtfec.html
If you want to bundle POS interfaces you have POS channel.
These are in addition to those which are already mentioned like MLPPP, IRB etc.
Of course these might have IOS version dependencies
03-31-2010 03:19 AM
There is a new Feature on the ISR-G2 29xx and 39xx which have dual-purpose GE-Interface
interface gig 0/1
media-type sfp
media-type sfp auto-failover
So the SFP of gig0/1 is the primary interface the RJ45 of the gig0/1 is the Backup-Interface.
So you do not have any need to configure BVI Interfaces.
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