Which BGP Distance Setting Changes iBGP Administrative Distance to 20?
Configure CLI and SD-WAN Manager feature configuration templates
Configure Cisco Catalyst SD-WAN data plane
Answer
Correct answer: A — Configure Internal Routes Distance to 20, which sets the administrative distance for iBGP routes in the SD-WAN BGP template.
[sampleXML/xmlfile-65_1.png] Refer to the exhibit. Which configuration value is used to change the administrative distance of iBGP routes to 20?
Community Insight
Tests the mapping between BGP route types and the vManage distance fields; the trap is confusing 'local' or 'external' with iBGP.
In Cisco SD-WAN BGP configuration, the administrative distance for iBGP routes is controlled by the Internal Routes Distance value. This page confirms that setting Internal Routes Distance to 20 changes the AD for iBGP-learned routes.
Learners pick Local Routes Distance because iBGP routes stay within the local AS, but 'local' in BGP distance refers to locally originated or redistributed routes, not routes learned from iBGP peers.
Community Discussion (22 comments)
donciga
👍 1
Selected: C
Based on this cisco documentation, the answer is C https://www.cisco.com/c/en/us/td/docs/routers/sdwan/26x-later/routing/routing-configuration-guide/border-gateway-protocol/configure-bgp.html
MikeG2055
👍 3
Selected: A
The question just asks about IBGP routes. If you change the "Internal Routes" the config that is adjusted is for what IBGP route distance is, not the local BGP routes. "distance bgp 20 XXX 20" . The description in the guides are very misleading but that is what the config does.
1d03e21
👍 1
Selected: C
C is correct: Internal Routes Distance (EBGP): Enter a value to apply as the BGP route administrative distance for routes coming from one AS into another. Range: 0 through 255 - Default: 200 Local Routes Distance (IBGP): Specify the BGP route administrative distance for routes within the local AS. By default, a route received locally from BGP is preferred over a route received from OMP. Range: 0 through 255 Default: 200 - External Routes Distance: Specify the BGP route administrative distance for routes learned from other sites in the overlay network. Range: 0 through 255 Default: 20 https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/routing/ios-xe-17/routing-book-xe/m-unicast-routing.html
uzbin
👍 3
Selected: A
Internal routes = iBGP Local routes = Locally connected interface IP subnets External routes = eBGP
Rcont
👍 2
Selected: C
Correct ans is C Local route for iBGP Internal route for eBGP
Loi2525
👍 2
C is the correct answer here, NOT A. here is the reference document: https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/routing/ios-xe-17/routing-book-xe/m-unicast-routing.html summary of timtgh is correct.
siang
👍 1
Selected: C
C is correct.
hamed4maf
👍 1
I think C is correct Internal Routes Distance Enter a value to apply as the BGP route administrative distance for routes coming from one AS into another. Local Routes Distance Specify the BGP route administrative distance for routes within the local AS. External Routes Distance Specify the BGP route administrative distance for routes learned from other sites in the overlay network.
Clouddon
👍 3
Correct ans is C Local route
timtgh
👍 4
Cisco's parameter names are really stupid, but we have to accept them: External = received from the overlay tunnel Internal = not from overlay tunnel, eBGP Local = not from overlay tunnel, iBGP
eoin1907g
👍 2
Selected: C
local routes distance is to change the AD of routes within the local AS
Nandhujoe
👍 1
Selected: A
A. Configure Internal Routes Distance to 20.
Nandhujoe
👍 1
Answer is A. Configure Internal Routes Distance to 20 is correct
JP4CCNP
👍 4
Selected: A
Answer A ist correct: internal Route-Distance = internal BGP Routes (Routes learned from a other internal BGP Neighbor - the same AS external Route-Distance: external BGP Routes (Routes learned from a other external BGP Neighbor - differnet AS Locla-Route Distance: Routes local on this Router redistributed into BGP (somthing like BGP Weight)
kk_learn
👍 2
Selected: C
C. Local Routes Distance Specify the BGP route administrative distance for routes within the local AS. By default, a route received locally from BGP is preferred over a route received from OMP.
Alchobashko
👍 3
Selected: C
C is correct. Take a look at document and definition of those.
Zdrobici
👍 1
Selected: A
I would go for A. Local routes means routes added via the network command under bgp process.
Erik_N
👍 1
I would go for A, as they are internal BGP routes, received from another peer in same AS. Local I think are routes injected into BGP. The descriptions in the documentation is confusing and not clear.
jsantokhi
👍 1
nternal Routes Distance Enter a value to apply as the BGP route administrative distance for routes coming from one AS into another. Range: 0 through 255 Default: 200 Local Routes Distance Specify the BGP route administrative distance for routes within the local AS. By default, a route received locally from BGP is preferred over a route received from OMP. Range: 0 through 255 Default: 200 External Routes Distance Specify the BGP route administrative distance for routes learned from other sites in the overlay network. Range: 0 through 255 Default: 20
Neil_Neo234
👍 1
Agreed. Its clearly written in the document below : https://www.cisco.com/c/en/us/td/docs/routers/sdwan/configuration/routing/vEdge-20-x/routing-book/m-unicast-routing.html
ngabor
👍 1
Internal Routes Distance Enter a value to apply as the BGP route administrative distance for routes coming from one AS into another. Range: 0 through 255 Default: 200 Local Routes Distance Specify the BGP route administrative distance for routes within the local AS. By default, a route received locally from BGP is preferred over a route received from OMP. Range: 0 through 255 Default: 200
A_Wolf
👍 6
nop, do not let the "internal routes" confuse you. the description says " - for routes coming from one AS into another-", if you recall your BGP, eBGP (external ) is from one AS to an other. if the routes are within the same AS , it is iBGP (internal routes). in vManage the description for local routes = iBGP
Comments & Corrections
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Expert Analysis
Why the Answer Is Correct
In the SD-WAN BGP feature template, the three distance fields map to the BGPdistance bgp external internal local command. The internal argument is the administrative distance for iBGP-learned routes, so setting Internal Routes Distance to 20 is what changes iBGP AD to 20. This preserves standard Cisco BGP semantics: eBGP routes use the external distance, iBGP routes use the internal distance, and locally originated or redistributed routes use the local distance. The question explicitly says "iBGP routes," which corresponds to the internal field, not the local field.Why the Other Options Are Wrong
Configuring Propagate AS Path to off affects AS-path propagation, not administrative distance, so option B cannot change any route's AD. Local Routes Distance (option C) applies to routes originated locally on the router, such as network statements or redistributed prefixes, not to routes learned from an iBGP peer. External Routes Distance (option D) applies to eBGP-learned routes; its default is already 20, but it does not modify iBGP routes, so it cannot satisfy the requirement.Community Comment Notes
Community opinion is split, largely because the vManage UI wording can be misread. JP4CCNP and MikeG2055 correctly support A, with JP4CCNP noting "internal Route-Distance = internal BGP Routes" and MikeG2055 pointing out that the question asks about iBGP routes specifically. A_Wolf and timtgh argue for C based on how they interpret the vManage descriptions, but that interpretation swaps the standard BGP mapping of local routes (locally originated) with iBGP routes. Loi2525 also cites a Cisco routing document for C, yet the underlying Cisco BGP distance semantics still assign iBGP to the internal distance.Official Reference
Exam Strategy
Memorize the BGP distance triad: external = eBGP, internal = iBGP, local = locally originated. When the question names iBGP explicitly, select the Internal Routes Distance field; do not be swayed by the fact that iBGP routes stay within the same AS.
Frequently Asked Questions
Why is Local Routes Distance not the field for iBGP route distance?
In BGP distance configuration, local applies to locally originated or redistributed routes, while internal applies specifically to iBGP-learned routes.
Does External Routes Distance control eBGP or iBGP?
External Routes Distance controls eBGP-learned routes; the default 20 does not affect iBGP, which uses Internal Routes Distance.
Related Analysis
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