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Internal data structure resulting from the First Method: six CIDR blocks comprising a pool of 101

2001:DB8::64 / 126 (100-103, 4 addresses)
2001:DB8::68 / 125 (104-111, 8 addresses)
2001:DB8::70 / 124 (112-127, 16 addresses)
2001:DB8::80 / 122 (128-191, 64 addresses)
2001:DB8::C0 / 125 (192-199, 8 addresses)
2001:DB8::C8 / 128 (200, only 1 address)


64 = (6 * 16^1 ) + ( 4 * 16^0 ) = 100
C0 = (12 * 16^1 ) + ( 0 ) = 192

versus
Internal data structure resulting from the Second Method: one CIDR block, one pool of 256
2001:DB8::00 / 120 (256 addresses)

The auto-negotiation option is only effective when using the GBIC media, it is used to enable the IEEE 802.1z Gigabit Ethernet (1000 Mbps) auto-negotiation protocol, thus the auto-negotiation feature is not supported when using the rj-45 media type (which is your case) and will be ignored if enabled, more over this feature has no relation with slowness or delay over the interface.
OSPFVirtualLink
OSPF Virtual Link from Area 34


OSPFVirtualLinkandStub
OSPF Virtual Link from Area 34:
you can stub iosv-4 and iov-5
EIGRPStub
EIGRP Stub


BGPMed
BGP Med


BGPExample2
BGP Example 2 with loopbacks


MultipleOSPFAreas
Multiple OSPF Areas


BGPRR
BGP Redistribution and Route Reflection
Client: OSPF and EIGRP


BGPRR2
BGP Redistribution and Route Reflection
Client 2: RIP, EIGRP, and OSPF

ACL_Routemap_RR
OSPF and EIGRP with routemaps,
route redistribution and access lists

Routesum
OSPF manual route summary



Loop
RIP and OSPF Loop Prevention
and fixing Sub-Optimal Routes

Loop
IPv4 and IPV6 RIP and OSPF Loop
Prevention,fixing Sub-Optimal Routes


RIPng
IPv6 RIP (RIPng) with
default-information originate for IPV6

SLAAC
IPv6 SLAAC with Agent Relay
between iosv-6 and iosv-7

DHCP
IPv6 DHCP with Agent Relay
between iosv-6 and iosv-7
IPv6IPV6EIGRPBGPRedistribution
IPv4 and IPv6 EIGRP 1 and 2 with BGP
in the middle on three links with redistribution
OSPFtoExternal
OSPF to External TFTP server

NB_OSPF
OSPF with Non-Broadcast and MD5

EIGRP2
IPv6 to IPv4 Tunnel with OPSFv3

EIGRP
EIGRP

EIGRP2
EIGRP with Offsets

IPv6NumberingwithIPv4
IPv6 Numbering with IPv4

IPv6NumberingwithIPv4