Segment Routing Flashcards 1.0
A Prefix-SID can only be associated with a single prefix.
True
A Prefix-SID can be assigned to any prefix, not just a /32 or /128 host prefix.
True
The SR continue operation is equivalent to the MPLS Pop operation.
False, Continue = Swap
SR Operation: Active segment is finished, next segment becomes active.
True
Node SID is not a prefix SID.
False
Node SID is a prefix SID with N flag, it must be /32 or /128.
True
Anycast SID is a prefix SID with N flag.
False
What type of SID can be used to steer traffic to a LAG?
L2 Adjacency SID
A layer 2 Adjacency-SID can be used to: - Send traffic over a specific interface of an EtherChannel, even if only one IGP adjacency is formed over that EtherChannel.
True
Which SID is used in cases where there are multiple adjacencies between nodes that are not bundled together using a LAG protocol, but you still wish to group ports together.
Group adj segment
__________ specify a group of neighbors, the resulting instruction of which is to ECMP towards those neighbors.
BGP Peer Set Segments
_________ specify a path or link to a specific neighbor and is signaled using BGP Link State.
BGP Peer Adjacency Segment
SR and non-SR nodes can coexist.
True
Complete: __________ nodes: Plain IPv6 forwarding is used. Solely based on IPv6 destination address. No SRH inspection or update is possible. Transparent and interoperable with legacy non-SR-capable nodes.
Non-SR transit
The _________ is a range of label values preserved for the manual allocation of adjacency segment identifiers (adj-SIDs). The default SRLB range is from ______ to _____
Segment Routing Local Block (SRLB), 15000 to 15999
The SRGB is advertised in the IS-IS _____ Capabilities TLV. The SR Capabilities sub-TLV is included in the _____ Capabilities TLV
Router for both
The flags in the SR-Capabilities sub-TLV are as follows: ___: IPv4; if set, the router is capable of outgoing IPv4 encapsulation on all interfaces. ___ : IPv6; if set, the router is capable of outgoing IPv6 encapsulation on all interfaces.
I, V
In the output of ‘sh isis database verbose’ what do the flags below indicate: X:0 R:0 N:1
Prefix is node SID
What do the flags below indicate? Router Cap: 10.0.255.5 D:0 S:0 Segment Routing: I:1 V:0, SRGB Base: 16000 Range: 8000
SID for IPv4 only
What OSPF command displays the capabilities of the router?
show ospf database opaque-area 4.0.0.0 self-originate
OSPF SR: What command displays information in the database related to SR?
show ospf database opaque-area
Identify among the entries below which are related to prefix SID: Type-10 Opaque Link Area Link States (Area 0) Link ID ADV Router 0.0.0 10.0.255.5 0.0.8 10.0.255.5 0.0.0 10.0.255.5 0.0.1 10.0.255.5 0.0.2 10.0.255.5 0.0.8 10.0.255.5
All that start with 7.x.x.x.x ext-prefix Extended Prefix LSA show ospf database opaque-area ext-prefix
Identify among the entries below which are related to router capabilities: Type-10 Opaque Link Area Link States (Area 0) Link ID ADV Router 0.0.0 10.0.255.3 0.0.5 10.0.255.3 0.0.7 10.0.255.3 0.0.0 10.0.255.3 0.0.1 10.0.255.3 0.0.5 10.0.255.3 0.0.7 10.0.255.3
4.0.0.0 router-info Router Information LSA show ospf database opaque-area router-info
Identify among the entries below which are related to transit links: Type-10 Opaque Link Area Link States (Area 0) Link ID ADV Router 0.0.0 10.0.255.3 0.0.5 10.0.255.3 0.0.7 10.0.255.3 0.0.0 10.0.255.3 0.0.1 10.0.255.3 0.0.5 10.0.255.3 0.0.7 10.0.255.3
8.x.x.x.x ext-link Extended Link LSA show ospf database opaque-area ext-link
