Advertise implicit-null label for static routes
Hi, I want to ask if there is any way to change the label or stop adveritise label for an static route. Normally LDP advertises an Implicit Null label for directly connected routes. We want to do similar thing for static routes.
We need to do this is because somehow we need to do rate-limit on the PE interface connecting to the core network instead of the interface connecting to CE. As the incoming packets still got labelled, the rate-limit is skipped. So we want to stop the PE creates label for the static routes or advertises them with implicit null label. Thanks in advance.
Calvin,
Bear in mind that if you only enter the "no mpls ldp advertise-label" command, LDP will stop propagating all labels, which might not ba what you want. If you selectively want to propagate certain labels, then you need to also use "mpls advertise label for " as Shivlu suggested.
Regards,
Similar Messages
-
Hi,
A quick question. Does anyone know if when said that last hop router signals implicit null to penultimate router it actually sends the advertisement (LDP for example) with a label value of 3 or is there another way to signal that?
If so, I assume that with MPLS-TE LSPs it's the same thing but with RSVP Resv message...
Thanks,
DavidHello David,
in fact Label value 3 has the meaning "implicit null". So whatever protocoll is used (LDP or RSVP) this is the signaled value to activate PHP (penultimate hop popping).
From RFC 3032 section 2.1
" iv. A value of 3 represents the "Implicit NULL Label". This is a label that an LSR may assign and distribute, but which never actually appears in the encapsulation. When an LSR would otherwise replace the label at the top of the stack with a new label, but the new label is "Implicit NULL", the LSR will pop the stack instead of doing the replacement. Although this value may never appear in the encapsulation, it needs to be specified in the Label Distribution Protocol, so a value is reserved."
Hope this helps! Please rate all helpful posts!
Martin -
I am trying to configure BFD for static routing on a 2431 running IOS 15.1(2)T to detect and route around simple multihoming faults. According to Cisco Feature Navigator, BFD for static routes is supported on c2430-ik9o3s-mz.151-2.T.bin. But when I follow the config guide steps to configure it, IOS does not recognize the commands, such as:
ERC3-IAD2431-3(config)#int fa0/0
ERC3-IAD2431-3(config-if)#bfd ?
% Unrecognized command
ERC3-IAD2431-3(config-if)#
and:
ERC3-IAD2431-3(config)#ip route static bfd fa0/0 172.19.113.241
% BFD is not supported on FastEthernet0/0
ERC3-IAD2431-3(config)#
Am I missing some prerequisite, or restriction?Vignesh,
As requested:
ERC3-IAD2431-3#show version
Cisco IOS Software, 2400 Software (C2430-IK9O3S-M), Version 15.1(2)T, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2010 by Cisco Systems, Inc.
Compiled Mon 19-Jul-10 16:23 by prod_rel_team
ROM: System Bootstrap, Version 12.3(7r)T2, RELEASE SOFTWARE (fc1)
ERC3-IAD2431-3 uptime is 1 week, 20 hours, 31 minutes
System returned to ROM by reload at 15:45:52 EDT Mon Oct 27 2014
System restarted at 15:47:56 EDT Mon Oct 27 2014
System image file is "flash:c2430-ik9o3s-mz.151-2.T.bin"
Last reload type: Normal Reload
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
[email protected].
Cisco IAD2431 (R527x) processor (revision 4.1) with 250880K/11264K bytes of memory.
Processor board ID FHK1444F1GM
R527x CPU at 225MHz, Implementation 40, Rev 3.1
2 FastEthernet interfaces
48 Serial interfaces
2 Channelized T1/PRI ports
1 Virtual Private Network (VPN) Module
DRAM configuration is 64 bits wide with parity disabled.
63K bytes of non-volatile configuration memory.
System fpga version is 250027
System readonly fpga version is 250027
Option for system fpga is 'system'.
126976K bytes of ATA System CompactFlash (Read/Write)
Configuration register is 0x2102
ERC3-IAD2431-3#show int fa0/0
FastEthernet0/0 is up, line protocol is up
Hardware is Gt96k FE, address is 5475.d026.3019 (bia 5475.d026.3019)
Description: Uplink to TWC/Avaya VoIP Network
Internet address is 24.30.210.144/27
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
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 00:00:00, output 00:00:00, output hang never
Last clearing of "show interface" counters never
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 2000 bits/sec, 3 packets/sec
5 minute output rate 1000 bits/sec, 2 packets/sec
40541 packets input, 6155984 bytes
Received 20517 broadcasts (0 IP multicasts)
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
149623 packets output, 22178324 bytes, 0 underruns
0 output errors, 0 collisions, 5 interface resets
17 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
ERC3-IAD2431-3#show int fa0/1
FastEthernet0/1 is up, line protocol is up
Hardware is Gt96k FE, address is 5475.d026.301a (bia 5475.d026.301a)
Internet address is 172.19.113.242/29
MTU 1500 bytes, BW 100000 Kbit/sec, DLY 100 usec,
reliability 255/255, txload 1/255, rxload 1/255
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 00:00:44, output 00:00:05, output hang never
Last clearing of "show interface" counters never
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 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
14829 packets input, 3324508 bytes
Received 7916 broadcasts (0 IP multicasts)
0 runts, 0 giants, 0 throttles
1 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
0 watchdog
0 input packets with dribble condition detected
78596 packets output, 7819210 bytes, 0 underruns
0 output errors, 0 collisions, 13 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
ERC3-IAD2431-3#
Thanks,
Alfy -
Check for Null in Mediator Static Routing filter
Using Expression Builder for Mediator component how can I check the values for NULL in a particular XML element. In my case the XSD is
<xs:complexType name="OdsCadDataSet">
<xs:choice>
<xs:element name="odsCadCase" type="OdsCadCase" minOccurs="0"
maxOccurs="1"/>
<xs:element name="odsCadEvent" type="OdsCadEvent" minOccurs="0"
maxOccurs="1"/>
<xs:element name="odsCadUnitStatus" type="OdsCadUnitStatus"
minOccurs="0" maxOccurs="1"/>
</xs:choice>
</xs:complexType>
I want to check in expression builder of mediator whether odsCase, odsCadEvent, odsCadUnitStatus is been processed. I have three static routing for each element and plan to put filter which checks is odsCadCase is null and so forth. How to have this use case.
Thanks
Edited by: user5108636 on 28/06/2010 00:15helo, i have same problem here...
I have a xsd:choice on request like this:
<message>
<properties>
<property name="tracking.compositeInstanceId" value="80003"/>
<property name="tracking.ecid" value="0000J1MQVAZBDC^5lVg8yZ1DtZWJ000T5r"/>
<property name="transport.http.remoteAddress" value="10.106.17.137"/>
</properties>
<parts>
<part name="request">
<ns1:parametrosConsultaGuia>
<ns1:guiaCompensacaoRequest>
<ns1:anoGuia>2011</ns1:anoGuia>
<ns1:numeroGuia>314</ns1:numeroGuia>
<ns1:codigoFatoGerador>6</ns1:codigoFatoGerador>
<ns1:codigoPorte>77011</ns1:codigoPorte>
</ns1:guiaCompensacaoRequest>
<ns1:guiaComplementarRequest>
<ns1:codigoEntidade/>
<ns1:classeEmbarcacao/>
<ns1:codigoPorte/>
<ns1:codigoAssunto/>
<ns1:fatoGerador/>
<ns1:numeroTransacaoInternet/>
</ns1:guiaComplementarRequest>
<ns1:guiaDesarquivamentoRequest>
<ns1:codigoAssunto/>
<ns1:idPessoa/>
</ns1:guiaDesarquivamentoRequest>
<ns1:guiaDividaAtivaRequest>
<ns1:numeroDebito/>
<ns1:codigoUsuario/>
</ns1:guiaDividaAtivaRequest>
<ns1:guiaNormalRequest>
<ns1:codigoEntidade/>
<ns1:codigoAssunto/>
<ns1:fatoGerador/>
<ns1:numeroTransacaoInternet/>
</ns1:guiaNormalRequest>
<ns1:guiaReferenciaRequest>
<ns1:numeroGuiaPai/>
<ns1:anoGuiaPai/>
<ns1:codigoEntidade/>
<ns1:classeEmbarcacao/>
<ns1:codigoAssunto/>
</ns1:guiaReferenciaRequest>
<ns1:guiaRemanescenteRequest>
<ns1:numeroDebito/>
<ns1:codigoUsuario/>
</ns1:guiaRemanescenteRequest>
<ns1:guiaMultaRequest>
<ns1:codigoEntidade/>
<ns1:dataVencimento/>
<ns1:valorMulta/>
<ns1:percentualDesconto/>
<ns1:percentualAcrescimo/>
</ns1:guiaMultaRequest>
</ns1:parametrosConsultaGuia>
</part>
</parts>
</message>
I tried everything to check if some of the requests are filled but allways mediator returns null:
03/06/2011 13:50:42MensagemEvaluation of xpath condition "string-length($in.request/guia:guiaRequest/guia:parametrosConsultaGuia/guia:guiaReferenciaRequest) > 0" resulted false
<payload>
Atividade03/06/2011 13:50:42MensagemonCase "GuiaCompensacao.getGuiaCompensacao"
03/06/2011 13:50:42MensagemEvaluation of xpath condition "$in.request/guia:guiaRequest/guia:parametrosConsultaGuia/guia:guiaCompensacaoRequest != ''" resulted false
<payload>
Atividade03/06/2011 13:50:42MensagemonCase "GuiaRemanescenteService.getGuiaRemanescente"
03/06/2011 13:50:42MensagemEvaluation of xpath condition "string-length($in.request/guia:guiaRequest/guia:parametrosConsultaGuia/guia:guiaRemanescenteRequest) > 0" resulted false
<payload>
Atividade03/06/2011 13:50:42MensagemonCase "GuiaMultaService.gerarBoleto"
03/06/2011 13:50:42MensagemEvaluation of xpath condition "string-length($in.request/guia:guiaRequest/guia:parametrosConsultaGuia/guia:guiaMultaRequest) > 0" resulted false
<payload>
Atividade03/06/2011 13:50:42MensagemonCase "GuiaDividaAtiva.getGuiaDividaAtiva"
03/06/2011 13:50:42MensagemEvaluation of xpath condition "string-length($in.request/guia:guiaRequest/guia:parametrosConsultaGuia/guia:guiaDividaAtivaRequest) > 0" resulted false
<payload>
Atividade03/06/2011 13:50:42MensagemonCase "GuiaDesarquivamento.getGuiaDesarquivamento"
03/06/2011 13:50:42MensagemEvaluation of xpath condition "string-length($in.request/guia:guiaRequest/guia:parametrosConsultaGuia/guia:guiaDesarquivamentoRequest) > 0" resulted false
<payload>
Atividade03/06/2011 13:50:42MensagemonCase "GuiaComplementarService.gerarBoleto"
03/06/2011 13:50:42MensagemEvaluation of xpath condition "string-length($in.request/guia:guiaRequest/guia:parametrosConsultaGuia/guia:guiaComplementarRequest) > 0" resulted false
<payload>
Atividade03/06/2011 13:50:42MensagemonCase "GuiaNormalService.gerarBoleto"
03/06/2011 13:50:42MensagemEvaluation of xpath condition "string-length($in.request/guia:guiaRequest/guia:parametrosConsultaGuia/guia:guiaNormalRequest) > 0" resulted false
<payload> -
hai experts,
just now stepped into mpls world.
i am refering the book "MPLS Fundamentals" by Luc De Ghein.
In the implicit null portion the author states that " PHP is the default mode in cisco IOS.In case of ipv4 over mpls ,cisco ios only advertise the implicit null label for directly connected routes and summarized routes."
but some of them told me that it will send implicit null for all routes it learns.
Which is true or is there any hidden meaning in connected and summarized routes???Hi,
If the question is about IPv4 routes learned in a VRF, then implicit-null will not be used at all - neither for PE directly connected nor for summary routes. The reason is that a PE needs a VPN label to identify the VRF context, because the IP destination address alone can not do it as you might have overlapping IP addresses in different VRFs. If you have a look at the labels in a VRF (show mpls forwarding-table vrf ...) you will see "Aggregate" for VRF connected or VRF summary routes. This denotes, that the PE will use the VPN label to select the proper VRF context and then has to perform an additional IP lookup to figure out, who should get the packet. If a label is for a VRF connected network the IP packet could be for the PE or the CE sharing this network. A VPN label alone in this case will not be enough, a double lookup is needed.
So implicit-null is used for summary routes or directly connected routes in the global IP routing table of a PE.
Hope this helps!
Regards, Martin -
Implicit null and explicit null
Hi,
1) If a router receives a label of 0,what is it supposed to do..?
label poppoing or swapping th label with 0.
2) If a router receives the label of 3,whether it pops the label or swap the incoming label with the value of 3..?
Thansk1. If a router recieves a label value of 0, this implies the explicit null label. The router will swap the top label for label 0 and forward the packet. The next LSR will pop the packet.
2. If a label of 3 is recieved, this implies the implicit null label. The router in this case will pop the top label and forward the remaining. If there was only one label in the stack, it will forward the IP packet, else the labelled packet with the topmost label removed.
Check this link, and RFC 3032 for more explanation
http://www.cisco.com/en/US/tech/tk436/tk428/technologies_q_and_a_item09186a00800949e5.shtml#q13 -
Implicit & Explicit Null Labels
Hi..
I am a bit confused in Implicit and Explicit null labels. The RFC Says as follows :
IMPLICIT NULL LABEL:This label value is only legal at the bottom of the label stack. It indicates that the label stack must be popped,
and the forwarding of the packet must then be based on the IPv4 header.
EXPLICIT NULL LABEL : This is a label that an LSR may assign and distribute, but which never actually appears in the encapsulation. When an LSR would otherwise replace the label at the top of the stack with a new label, but the new label is "Implicit NULL", the LSR will pop the stack instead of doing the
replacement. Although this value may never appear in the encapsulation, it needs to be specified in the Label Distribution Protocol, so a value is reserved.
My question is, which one is used in PHP operation. Consider I have a scenario like this :
CE1--PE1---P---PE2---CE2
How do I make the P router as the PHP router in this case???I need to have a implicit null label set on P router????
What about explicit null label then???
Regards,
RAJby defaulf, the P router will use implicit null label. For you to use the explicit null label, use the command
mpls ldp explicit-null.
The explicit null label is often useful in QoS implementation scenarios.
See the following url
http://www.cisco.com/en/US/products/ps6350/products_command_reference_chapter09186a0080430c63.html#wp1020450 -
Hello,
I set up a network (192.168.1.0), with a wrt160n router. I want to create a second network (192.168.2.0) and use the router to set up a static route between the two networks. Whenever I try to set up a static route and save the settings I get the error "invalid static route", although I think I use the correct data:
destination lan ip: 192.168.2.0
subnet mask: 255.255.255.0
Gateway: 192.168.2.1 (static ip of the router in the second nw)
interface: lan & wireless
I already did an upgrade of the firmware but to no avail.
Anybody any ideas?
Best regards,
ChristopheAre you setting the first network with 192.168.1.0 or 192.168.0.1....?
Make the first network at 192.168.0.1 and second at 192.168.0.2.Follow this link for Static Routing. -
SGE2000/P Static Routing (equals L2+) Explain?
What does L2+ mean? I realize these aren't L3 switches with SVI capabilities, so what is the purpose of configuring static routes if there is no InterVLAN routing capability?
T.I.A.,
ChrisWelcome to Cisco Community!
With out getting into a huge discussion I will try to answer as quickly and directly as possible.
Our SFE and SGE series switches are Layer 3 switches (can also be configured as L2) so they are able to perform as a (inter VLAN) router or gateway for all VLANs. Once you have created the VLANs and assigned each an IP address, that IP address will become the GW for that VLAN. Under Routing you will not see any learned networks until you assign the VLAN to a port and the port becomes active. You will then need to configure a default route to send the traffic out to the cloud. The router will need to belong to the same VLAN as the switch. So if the switch has an IP address of 172.16.30.1/24, the router will have an IP of 172.16.30.254/24 for example. The route would read like this: 0.0.0.0/0 next hop 172.16.30.254 metric 2 (or higher).
As for static routes as a L2 or L3 switch, they would be useful when you have a device attached to another switch which is disjoined from your typical network on the local switch. In other words, lets say you have 3 (aside from default native VLAN 1) VLANs V10 - 30. All you of your devices belong to these VLANs but you have a server on VLAN 30 which is not connected to this switch. You will then create a static route for that server's IP address to the remote switch.
VLAN30: 172.16.30.1 (local SGE)
Server: 172.16.30.200 (on remote switch)
Remote Switch: 192.168.20.1 (remote SGE)
VLAN30: 172.16.30.2 (on remote SGE)
Static Route:
destination 172.16.30.200 next hop 172.16.30.2 metric 2
I hope this answers your question. These are really my favorite switches, as I find them very reliable and highly configurable. I love these things. -
Default static route and Null 0
Hi Everyone,
Need to clear some doubts for below setup
Switch 3550A is connected to Internet Router and has OSPF nei relationship with it.
3550A# sh run int fa0/11
Building configuration...
Current configuration : 272 bytes
interface FastEthernet0/11
description OSPF LAN Connection to 2691 Router Interface Fas 0/1
no switchport
ip address 192.168.5.2 255.255.255.254
sh ip route shows
3550A#sh ip route
Gateway of last resort is 192.168.5.3 to network 0.0.0.0
O*E2 0.0.0.0/0 [110/1] via 192.168.5.3, 20:39:56, FastEthernet0/11
3550A#
All is working fine.
For testing purposes i config below static route on 3550A
ip default-network 192.168.1.0
ip route 192.168.1.0 255.255.255.0 Null0
After above change
3550A# sh ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
S* 192.168.1.0/24 is directly connected, Null0
O*E2 0.0.0.0/0 [110/1] via 192.168.5.3, 20:38:38, FastEthernet0/11
Now i can not ping to internet as below
3550A#ping 4.2.2.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.2.2.2, timeout is 2 seconds:
Success rate is 0 percent (0/5)
When we ping from Switch then source IP is always the Outside interface IP right?
So in this case Switch is using which IP as source?
Ping to internet is not working as default network is set to 192.168.1.0 and all request goes to this IP and then it goes to
Null interface right?
Extended ping works fine as below
3550A#ping
Protocol [ip]:
Target IP address: 4.2.2.2
Repeat count [5]:
Datagram size [100]:
Timeout in seconds [2]:
Extended commands [n]: y
Source address or interface: 192.168.5.2
Type of service [0]:
Set DF bit in IP header? [no]:
Validate reply data? [no]:
Data pattern [0xABCD]:
Loose, Strict, Record, Timestamp, Verbose[none]:
Sweep range of sizes [n]:
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 4.2.2.2, timeout is 2 seconds:
Packet sent with a source address of 192.168.5.2
Success rate is 100 percent (5/5), round-trip min/avg/max = 76/79/80 ms
Second thing to confirm is this ping works because 192.168.5.2 is directly connected to Internet Router interface?
Regards
MAheshHi Mahesh,
When we ping from Switch then source IP is always the Outside interface IP right?
That is correct. By default it is always the outgoing interface on the device unless you specify it differently.
Ping to internet is not working as default network is set to 192.168.1.0 and all request goes to this IP and then it goes to
Null interface right?
That is correct. Null0 can't be used as next-hop.
Second thing to confirm is this ping works because 192.168.5.2 is directly connected to Internet Router interface?
No, that is because 192.168.5.0/30 is NATed. Remember 192.168.x.x address is a private segment and cannot access the Internet unless NAT is used.
HTH
Reza -
How do you Redistribution EIGRP into OSPF and maintain a distance of 250 for a static route?
Ok, I have scoured the forums long enough and have to post. The design is below. I moved a firewall to our new data center, which required adding some static routes for VPN connections and broadband backups. To minimize the amount of static routes I redistribute static into EIGRP with a route-map and prefix-list.
My problem is the next part of my network. When the data leaves my 56128's it hits an edge device connecting to our dark fiber. On this edge device I am running OSPF onto the dark fiber, then redistribute some EIGRP subnets into OSPF and again all is well.
Everything works up until the point the redistributed routes hit my RIB at my main data center where I am running IBGP. IBPG is run between our MPLS router and core for all our remote sites. When my backup route from the 56128's hits the cores, it supersedes the BGP route because the AD route O E2 [110/20] is lower than the BGP AD B [200/0]. Given the configuration below what can be done to remedy this? Oh when I redistribute I can only change the AD for the backup routes, all other routes should stay the same.
56128's where my static routes are:
ip route 192.168.101.0/24 192.168.30.77 name firewall 250
router eigrp 65100
redistribute static route-map Static-To-Eigrp
route-map Static-To-Eigrp permit 10
match ip address prefix-list Static2Eigrp
ip prefix-list Static2Eigrp seq 2 permit 192.168.101.0/24
Edge device:
router eigrp 65100
network 172.18.0.5 0.0.0.0
network 172.18.0.32 0.0.0.3
network 172.18.0.36 0.0.0.3
redistribute ospf 65100 metric 2000000 0 255 1 1500
redistribute static metric 200000 0 255 1 1500 route-map STATICS_INTO_EIGRP
passive-interface default
no passive-interface Port-channel11
no passive-interface Port-channel12
eigrp router-id 172.18.0.5
router ospf 65100
router-id 172.18.0.5
log-adjacency-changes
redistribute eigrp 65100 subnets route-map EIGRP_INTO_OSPF
passive-interface default
no passive-interface GigabitEthernet1/0/1
no passive-interface GigabitEthernet1/0/2
no passive-interface GigabitEthernet2/0/1
no passive-interface GigabitEthernet2/0/2
network 172.18.0.0 0.0.255.255 area 0
ip prefix-list EIGRP_INTO_OSPF seq 5 permit 172.18.0.0/16 le 32
ip prefix-list EIGRP_INTO_OSPF seq 10 permit 192.168.94.0/29 le 32
ip prefix-list EIGRP_INTO_OSPF seq 15 permit 192.168.26.32/29 le 32
ip prefix-list EIGRP_INTO_OSPF seq 20 permit 192.168.30.72/29 le 32
ip prefix-list EIGRP_INTO_OSPF seq 25 permit 192.168.20.128/25 le 32
ip prefix-list EIGRP_INTO_OSPF seq 26 permit 192.168.101.0/24 le 32 <- Backup Route for MPLS Remote Office
route-map EIGRP_INTO_OSPF permit 10
match ip address prefix-list EIGRP_INTO_OSPFSo in the case of a /24. If it were say broken up into /25's? From our remote sites we are using aggregate-address summary-only. Not sure how I would advertise a more specific route via BGP, sorry.
I didnt have this problem until I moved my firewalls. They plugged into the cores where IBGP was running and the static never kicked in unless the bgp route disappeared. I guess I could use my static redistribution for my VPN sites and use statics across the cores for the handful of backup links I have. -
OSPF down-bit set for a route originated as static?
If remote PE is redistributing a static route to VRF, local PE will get this route via BGP. Now suppose this local PE and CE is running OSPF and BGP VPNv4 route is redistributed to OSPF, will this PE set down-bit for type 5 LSAs advertised to CE?
I am bit confused by RFC-4576, it states that "When a type 3, 5, or 7 LSA is sent from a PE to a CE, the DN bit MUST be set", my understanding is that only if the route is originated from OSPF (at remote PE) then PE will set down-bit in LSAs advertised to CE.Niranjan,
IOS also set the tag to the BGP ASN on external routes as a loop avoidance mechanism as described in RFC 4577, section 4.2.5.2. According to the same RFC, this method has to be supported by default by any compliant implementation for backward compatibility purposes.
RFC4576: Using a Link State Advertisement (LSA) Options Bit to Prevent Looping in BGP/MPLS IP Virtual Private Networks (VPNs)
http://www.ietf.org/rfc/rfc4576.txt?number=4576
RFC4577: OSPF as the Provider/Customer Edge Protocol for BGP/MPLS IP Virtual Private Networks (VPNs)
http://www.ietf.org/rfc/rfc4577.txt?number=4577
Regards, -
Need Help for configuring Floating static route in My ASA.
Hi All,
I need your support for doing a floating static route in My ASA.
I have tried this last time but i was not able to make it. But this time i have to Finish it.
Please find our network Diagram and configuration of ASA
route outside 0.0.0.0 0.0.0.0 6.6.6.6 1 track 1
route outside 0.0.0.0 0.0.0.0 6.6.6.6 1
route rOutside 0.0.0.0 0.0.0.0 3.3.3.3 10
route inside 10.10.4.0 255.255.255.0 10.10.3.1 1
route inside 10.10.8.0 255.255.255.0 10.10.3.1 1
route inside 10.10.9.0 255.255.255.0 10.10.3.1 1
route inside 10.10.15.0 255.255.255.0 10.10.3.1 1
route rOutside x.x.x.x 255.255.255.255 5.5.5.5 1
timeout xlate 3:00:00
timeout conn 1:00:00 half-closed 0:10:00 udp 0:02:00 icmp 0:00:02
timeout sunrpc 0:10:00 h323 0:05:00 h225 1:00:00 mgcp 0:05:00 mgcp-pat 0:05:00
timeout sip 0:30:00 sip_media 0:02:00 sip-invite 0:03:00 sip-disconnect 0:02:00
timeout sip-provisional-media 0:02:00 uauth 0:05:00 absolute
timeout tcp-proxy-reassembly 0:01:00
dynamic-access-policy-record DfltAccessPolicy
http server enable
http 10.10.3.77 255.255.255.255 inside
http 10.10.8.157 255.255.255.255 inside
http 10.10.3.59 255.255.255.255 inside
no snmp-server location
no snmp-server contact
snmp-server enable traps snmp authentication linkup linkdown coldstart
sla monitor 123
type echo protocol ipIcmpEcho 8.8.8.8 interface outside
num-packets 3
frequency 10
sla monitor schedule 123 life forever start-time now
crypto ipsec transform-set cpa esp-3des esp-md5-hmac
crypto ipsec security-association lifetime seconds 28800
crypto ipsec security-association lifetime kilobytes 4608000
crypto map vpn_cpa 1 match address acl_cpavpn
crypto map vpn_cpa 1 set peer a.a.a.a
crypto map vpn_cpa 1 set transform-set abc
crypto map vpn_cpa 1 set security-association lifetime seconds 3600
crypto map vpn_cpa interface outside
crypto isakmp identity address
crypto isakmp enable outside
crypto isakmp policy 10
authentication pre-share
encryption 3des
hash md5
group 2
lifetime 86400
crypto isakmp policy 65535
authentication pre-share
encryption 3des
hash sha
group 2
lifetime 86400
track 1 rtr 123 reachability
telnet 10.10.3.77 255.255.255.255 inside
telnet 10.10.8.157 255.255.255.255 inside
telnet 10.10.3.61 255.255.255.255 inside
telnet timeout 500
ssh timeout 5
console timeout 0
threat-detection basic-threat
threat-detection statistics port
threat-detection statistics protocol
threat-detection statistics access-list
no threat-detection statistics tcp-intercept
ntp server 10.10.3.14
webvpn
tunnel-group .a.a.a.a ipsec-attributes
pre-shared-key *
class-map inspection_default
match default-inspection-traffic
policy-map type inspect dns preset_dns_map
parameters
message-length maximum 512
policy-map global_policy
class inspection_default
inspect dns preset_dns_map
inspect ftp
inspect h323 h225
inspect h323 ras
inspect netbios
inspect rsh
inspect rtsp
inspect skinny
inspect esmtp
inspect sqlnet
inspect sunrpc
inspect tftp
inspect sip
inspect xdmcp
service-policy global_policy global
smtp-server 10.10.5.11
prompt hostname context
Cryptochecksum:eea6e7b6efe5d1a180439658c3912942
: end
i think half of the configuration stil there in the ASA.
Diagram.
Thanks
RoopeshYou have missed the last command in your configuration, Please check it again
route ISP1 0.0.0.0 0.0.0.0 6.6.6.6 track 1
route ISP2 0.0.0.0 0.0.0.0 3.3.3.3
sla monitor 10
type echo protocol ipIcmpEcho 8.8.8.8 interface ISP1
num-packets 3
frequency 10
sla monitor schedule 123 life forever start-time now
track 1 rtr 123 reachability
You can do NAT in same way, here the logical name of the interface will be different.
Share the result
Please rate any helpful posts. -
Hi All
Is it possible in IOS to have for a particular subnet:
a) Two static routes?
b) Make one static route a higher priority than the other?
c) If one static router "goes down", failover to the lower priority static route?
We have a l2tp/vpdn connection to a supplier which can be accessed via two vlans/routes. I would like to make one route the preferred one but the "route" to failover if the preferred route goes down.
Again, many thanks in advance for all responses!
Thanks
JohnHi John,
Hope the below explaination will help you...
R1(config)# ip route 0.0.0.0 0.0.0.0 2.2.2.2
R1(config)# ip route 0.0.0.0 0.0.0.0 3.3.3.3 10
If you notice the Administrative Distance for the secondary route pointing to ISP2 is increased to 10 so that it becomes the backup link.
The above configuration with just two floating static routes partially accomplishes our requirement as it will work only in the scenario where the routers interfaces connected to the WAN link are in up/down or down/down status. But in a lot of situations we see that even though the links remain up but we are not able to reach the gateway, this usually happens when the issue is at the ISP side.
In such scenarios, IP SLAs becomes an engineer's best friend. With around six additional IOS commands we can have a more reliable automatic failover environment.
Using IP SLA the Cisco IOS gets the ability to use Internet Control Message Protocol (ICMP) pings to identify when a WAN link goes down at the remote end and hence allows the initiation of a backup connection from an alternative port. The Reliable Static Routing Backup using Object Tracking feature can ensure reliable backup in the case of several catastrophic events, such as Internet circuit failure or peer device failure.
IP SLA is configured to ping a target, such as a publicly routable IP address or a target inside the corporate network or your next-hop IP on the ISP's router. The pings are routed from the primary interface only. Following a sample configuration of IP SLA to generate icmp ping targeted at the ISP1s next-hop IP.
R1(config)# ip sla 1
R1(config)# icmp-echo 2.2.2.2 source-interface FastEthernet0/0
R1(config)# timeout 1000
R1(config)# threshold 2
R1(config)# frequency 3
R1(config)# ip sla schedule 1 life forever start-time now
The above configuration defines and starts an IP SLA probe.
The ICMP Echo probe sends an ICMP Echo packet to next-hop IP 2.2.2.2 every 3 seconds, as defined by the “frequency” parameter.
Timeout sets the amount of time (in milliseconds) for which the Cisco IOS IP SLAs operation waits for a response from its request packet.
Threshold sets the rising threshold that generates a reaction event and stores history information for the Cisco IOS IP SLAs operation.
After defining the IP SLA operation our next step is to define an object that tracks the SLA probe. This can be accomplished by using the IOS Track Object as shown below:
R1(config)# track 1 ip sla 1 reachability
The above command will track the state of the IP SLA operation. If there are no ping responses from the next-hop IP the track will go down and it will come up when the ip sla operation starts receiving ping response.
To verify the track status use the use the “show track” command as shown below:
R1# show track
Track 1
IP SLA 1 reachability
Reachability is Down
1 change, last change 00:03:19
Latest operation return code: Unknown
The above output shows that the track status is down. Every IP SLAs operation maintains an operation return-code value. This return code is interpreted by the tracking process. The return code may return OK, OverThreshold, and several other return codes.
Different operations may have different return-code values, so only values common to all operation types are used. The below table shows the track states as per the IP SLA return code.
Tracking
Return Code
Track State
Reachability
OK or over threshold
(all other return codes)
Up
Down
The Last step in the IP SLA Reliable Static Route configuration is to add the “track” statement to the default routes pointing to the ISP routers as shown below:
R1(config)# ip route 0.0.0.0 0.0.0.0 2.2.2.2 track 1
R1(config)# ip route 0.0.0.0 0.0.0.0 3.3.3.3 10
The track number keyword and argument combination specifies that the static route will be installed only if the state of the configured track object is up. Hence if the track status is down the secondary route will be used to forward all the traffic.
Please rate the helpfull posts.
Regards,
Naidu. -
I´m doing a design for presale, where I will need a router what support PAT for 500 or a little more of users, it not need any more features only static routing and dhcp pool for 500 users, can you help me for know what router recommend?
What is your WAN speed currently and projected WAN speed in the next 3 years?
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